/**
 * Copyright 2014 Tim Down.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * log4javascript
 *
 * log4javascript is a logging framework for JavaScript based on log4j
 * for Java. This file contains all core log4javascript code and is the only
 * file required to use log4javascript, unless you require support for
 * document.domain, in which case you will also need console.html, which must be
 * stored in the same directory as the main log4javascript.js file.
 *
 * Author: Tim Down <tim@log4javascript.org>
 * Version: 1.4.11
 * Edition: log4javascript
 * Build date: 19 February 2015
 * Website: http://log4javascript.org
 */
(function(factory, root) {
	if (typeof define == "function") {
		// AMD. Register as an anonymous module.
		define(factory);
	} else if (typeof module != "undefined" && typeof exports == "object") {
		// Node/CommonJS style
		module.exports = factory();
	} else {
		// No AMD or CommonJS support so we place log4javascript in (probably) the global variable
		root.log4javascript = factory();
	}
})(function() {
	// Array-related stuff. Next three methods are solely for IE5, which is missing them
	if (!Array.prototype.push) {
		Array.prototype.push = function() {
			for (var i = 0, len = arguments.length; i < len; i++){
				this[this.length] = arguments[i];
			}
			return this.length;
		};
	}

	if (!Array.prototype.shift) {
		Array.prototype.shift = function() {
			if (this.length > 0) {
				var firstItem = this[0];
				for (var i = 0, len = this.length - 1; i < len; i++) {
					this[i] = this[i + 1];
				}
				this.length = this.length - 1;
				return firstItem;
			}
		};
	}

	if (!Array.prototype.splice) {
		Array.prototype.splice = function(startIndex, deleteCount) {
			var itemsAfterDeleted = this.slice(startIndex + deleteCount);
			var itemsDeleted = this.slice(startIndex, startIndex + deleteCount);
			this.length = startIndex;
			// Copy the arguments into a proper Array object
			var argumentsArray = [];
			for (var i = 0, len = arguments.length; i < len; i++) {
				argumentsArray[i] = arguments[i];
			}
			var itemsToAppend = (argumentsArray.length > 2) ?
				itemsAfterDeleted = argumentsArray.slice(2).concat(itemsAfterDeleted) : itemsAfterDeleted;
			for (i = 0, len = itemsToAppend.length; i < len; i++) {
				this.push(itemsToAppend[i]);
			}
			return itemsDeleted;
		};
	}

	/* ---------------------------------------------------------------------- */

	function isUndefined(obj) {
		return typeof obj == "undefined";
	}

	/* ---------------------------------------------------------------------- */
	// Custom event support

	function EventSupport() {}

	EventSupport.prototype = {
		eventTypes: [],
		eventListeners: {},
		setEventTypes: function(eventTypesParam) {
			if (eventTypesParam instanceof Array) {
				this.eventTypes = eventTypesParam;
				this.eventListeners = {};
				for (var i = 0, len = this.eventTypes.length; i < len; i++) {
					this.eventListeners[this.eventTypes[i]] = [];
				}
			} else {
				handleError("log4javascript.EventSupport [" + this + "]: setEventTypes: eventTypes parameter must be an Array");
			}
		},

		addEventListener: function(eventType, listener) {
			if (typeof listener == "function") {
				if (!array_contains(this.eventTypes, eventType)) {
					handleError("log4javascript.EventSupport [" + this + "]: addEventListener: no event called '" + eventType + "'");
				}
				this.eventListeners[eventType].push(listener);
			} else {
				handleError("log4javascript.EventSupport [" + this + "]: addEventListener: listener must be a function");
			}
		},

		removeEventListener: function(eventType, listener) {
			if (typeof listener == "function") {
				if (!array_contains(this.eventTypes, eventType)) {
					handleError("log4javascript.EventSupport [" + this + "]: removeEventListener: no event called '" + eventType + "'");
				}
				array_remove(this.eventListeners[eventType], listener);
			} else {
				handleError("log4javascript.EventSupport [" + this + "]: removeEventListener: listener must be a function");
			}
		},

		dispatchEvent: function(eventType, eventArgs) {
			if (array_contains(this.eventTypes, eventType)) {
				var listeners = this.eventListeners[eventType];
				for (var i = 0, len = listeners.length; i < len; i++) {
					listeners[i](this, eventType, eventArgs);
				}
			} else {
				handleError("log4javascript.EventSupport [" + this + "]: dispatchEvent: no event called '" + eventType + "'");
			}
		}
	};

	/* -------------------------------------------------------------------------- */

	var applicationStartDate = new Date();
	var uniqueId = "log4javascript_" + applicationStartDate.getTime() + "_" +
		Math.floor(Math.random() * 100000000);
	var emptyFunction = function() {};
	var newLine = "\r\n";
	var pageLoaded = false;

	// Create main log4javascript object; this will be assigned public properties
	function Log4JavaScript() {}
	Log4JavaScript.prototype = new EventSupport();

	var log4javascript = new Log4JavaScript();
	log4javascript.version = "1.4.11";
	log4javascript.edition = "log4javascript";

	/* -------------------------------------------------------------------------- */
	// Utility functions

	function toStr(obj) {
		if (obj && obj.toString) {
			return obj.toString();
		} else {
			return String(obj);
		}
	}

	function getExceptionMessage(ex) {
		if (ex.message) {
			return ex.message;
		} else if (ex.description) {
			return ex.description;
		} else {
			return toStr(ex);
		}
	}

	// Gets the portion of the URL after the last slash
	function getUrlFileName(url) {
		var lastSlashIndex = Math.max(url.lastIndexOf("/"), url.lastIndexOf("\\"));
		return url.substr(lastSlashIndex + 1);
	}

	// Returns a nicely formatted representation of an error
	function getExceptionStringRep(ex) {
		if (ex) {
			var exStr = "Exception: " + getExceptionMessage(ex);
			try {
				if (ex.lineNumber) {
					exStr += " on line number " + ex.lineNumber;
				}
				if (ex.fileName) {
					exStr += " in file " + getUrlFileName(ex.fileName);
				}
			} catch (localEx) {
				logLog.warn("Unable to obtain file and line information for error");
			}
			if (showStackTraces && ex.stack) {
				exStr += newLine + "Stack trace:" + newLine + ex.stack;
			}
			return exStr;
		}
		return null;
	}

	function bool(obj) {
		return Boolean(obj);
	}

	function trim(str) {
		return str.replace(/^\s+/, "").replace(/\s+$/, "");
	}

	function splitIntoLines(text) {
		// Ensure all line breaks are \n only
		var text2 = text.replace(/\r\n/g, "\n").replace(/\r/g, "\n");
		return text2.split("\n");
	}

	var urlEncode = (typeof window.encodeURIComponent != "undefined") ?
		function(str) {
			return encodeURIComponent(str);
		}: 
		function(str) {
			return escape(str).replace(/\+/g, "%2B").replace(/"/g, "%22").replace(/'/g, "%27").replace(/\//g, "%2F").replace(/=/g, "%3D");
		};

	function array_remove(arr, val) {
		var index = -1;
		for (var i = 0, len = arr.length; i < len; i++) {
			if (arr[i] === val) {
				index = i;
				break;
			}
		}
		if (index >= 0) {
			arr.splice(index, 1);
			return true;
		} else {
			return false;
		}
	}

	function array_contains(arr, val) {
		for(var i = 0, len = arr.length; i < len; i++) {
			if (arr[i] == val) {
				return true;
			}
		}
		return false;
	}

	function extractBooleanFromParam(param, defaultValue) {
		if (isUndefined(param)) {
			return defaultValue;
		} else {
			return bool(param);
		}
	}

	function extractStringFromParam(param, defaultValue) {
		if (isUndefined(param)) {
			return defaultValue;
		} else {
			return String(param);
		}
	}

	function extractIntFromParam(param, defaultValue) {
		if (isUndefined(param)) {
			return defaultValue;
		} else {
			try {
				var value = parseInt(param, 10);
				return isNaN(value) ? defaultValue : value;
			} catch (ex) {
				logLog.warn("Invalid int param " + param, ex);
				return defaultValue;
			}
		}
	}

	function extractFunctionFromParam(param, defaultValue) {
		if (typeof param == "function") {
			return param;
		} else {
			return defaultValue;
		}
	}

	function isError(err) {
		return (err instanceof Error);
	}

	if (!Function.prototype.apply){
		Function.prototype.apply = function(obj, args) {
			var methodName = "__apply__";
			if (typeof obj[methodName] != "undefined") {
				methodName += String(Math.random()).substr(2);
			}
			obj[methodName] = this;

			var argsStrings = [];
			for (var i = 0, len = args.length; i < len; i++) {
				argsStrings[i] = "args[" + i + "]";
			}
			var script = "obj." + methodName + "(" + argsStrings.join(",") + ")";
			var returnValue = eval(script);
			delete obj[methodName];
			return returnValue;
		};
	}

	if (!Function.prototype.call){
		Function.prototype.call = function(obj) {
			var args = [];
			for (var i = 1, len = arguments.length; i < len; i++) {
				args[i - 1] = arguments[i];
			}
			return this.apply(obj, args);
		};
	}

	/* ---------------------------------------------------------------------- */
	// Simple logging for log4javascript itself

	var logLog = {
		quietMode: false,

		debugMessages: [],

		setQuietMode: function(quietMode) {
			this.quietMode = bool(quietMode);
		},

		numberOfErrors: 0,

		alertAllErrors: false,

		setAlertAllErrors: function(alertAllErrors) {
			this.alertAllErrors = alertAllErrors;
		},

		debug: function(message) {
			this.debugMessages.push(message);
		},

		displayDebug: function() {
			alert(this.debugMessages.join(newLine));
		},

		warn: function(message, exception) {
		},

		error: function(message, exception) {
			if (++this.numberOfErrors == 1 || this.alertAllErrors) {
				if (!this.quietMode) {
					var alertMessage = "log4javascript error: " + message;
					if (exception) {
						alertMessage += newLine + newLine + "Original error: " + getExceptionStringRep(exception);
					}
					alert(alertMessage);
				}
			}
		}
	};
	log4javascript.logLog = logLog;

	log4javascript.setEventTypes(["load", "error"]);

	function handleError(message, exception) {
		logLog.error(message, exception);
		log4javascript.dispatchEvent("error", { "message": message, "exception": exception });
	}

	log4javascript.handleError = handleError;

	/* ---------------------------------------------------------------------- */

	var enabled = !((typeof log4javascript_disabled != "undefined") &&
					log4javascript_disabled);

	log4javascript.setEnabled = function(enable) {
		enabled = bool(enable);
	};

	log4javascript.isEnabled = function() {
		return enabled;
	};

	var useTimeStampsInMilliseconds = true;

	log4javascript.setTimeStampsInMilliseconds = function(timeStampsInMilliseconds) {
		useTimeStampsInMilliseconds = bool(timeStampsInMilliseconds);
	};

	log4javascript.isTimeStampsInMilliseconds = function() {
		return useTimeStampsInMilliseconds;
	};
	

	// This evaluates the given expression in the current scope, thus allowing
	// scripts to access private variables. Particularly useful for testing
	log4javascript.evalInScope = function(expr) {
		return eval(expr);
	};

	var showStackTraces = false;

	log4javascript.setShowStackTraces = function(show) {
		showStackTraces = bool(show);
	};

	/* ---------------------------------------------------------------------- */
	// Levels

	var Level = function(level, name) {
		this.level = level;
		this.name = name;
	};

	Level.prototype = {
		toString: function() {
			return this.name;
		},
		equals: function(level) {
			return this.level == level.level;
		},
		isGreaterOrEqual: function(level) {
			return this.level >= level.level;
		}
	};

	Level.ALL = new Level(Number.MIN_VALUE, "ALL");
	Level.TRACE = new Level(10000, "TRACE");
	Level.DEBUG = new Level(20000, "DEBUG");
	Level.INFO = new Level(30000, "INFO");
	Level.WARN = new Level(40000, "WARN");
	Level.ERROR = new Level(50000, "ERROR");
	Level.FATAL = new Level(60000, "FATAL");
	Level.OFF = new Level(Number.MAX_VALUE, "OFF");

	log4javascript.Level = Level;

	/* ---------------------------------------------------------------------- */
	// Timers

	function Timer(name, level) {
		this.name = name;
		this.level = isUndefined(level) ? Level.INFO : level;
		this.start = new Date();
	}

	Timer.prototype.getElapsedTime = function() {
		return new Date().getTime() - this.start.getTime();
	};

	/* ---------------------------------------------------------------------- */
	// Loggers

	var anonymousLoggerName = "[anonymous]";
	var defaultLoggerName = "[default]";
	var nullLoggerName = "[null]";
	var rootLoggerName = "root";

	function Logger(name) {
		this.name = name;
		this.parent = null;
		this.children = [];

		var appenders = [];
		var loggerLevel = null;
		var isRoot = (this.name === rootLoggerName);
		var isNull = (this.name === nullLoggerName);

		var appenderCache = null;
		var appenderCacheInvalidated = false;
		
		this.addChild = function(childLogger) {
			this.children.push(childLogger);
			childLogger.parent = this;
			childLogger.invalidateAppenderCache();
		};

		// Additivity
		var additive = true;
		this.getAdditivity = function() {
			return additive;
		};

		this.setAdditivity = function(additivity) {
			var valueChanged = (additive != additivity);
			additive = additivity;
			if (valueChanged) {
				this.invalidateAppenderCache();
			}
		};

		// Create methods that use the appenders variable in this scope
		this.addAppender = function(appender) {
			if (isNull) {
				handleError("Logger.addAppender: you may not add an appender to the null logger");
			} else {
				if (appender instanceof log4javascript.Appender) {
					if (!array_contains(appenders, appender)) {
						appenders.push(appender);
						appender.setAddedToLogger(this);
						this.invalidateAppenderCache();
					}
				} else {
					handleError("Logger.addAppender: appender supplied ('" +
						toStr(appender) + "') is not a subclass of Appender");
				}
			}
		};

		this.removeAppender = function(appender) {
			array_remove(appenders, appender);
			appender.setRemovedFromLogger(this);
			this.invalidateAppenderCache();
		};

		this.removeAllAppenders = function() {
			var appenderCount = appenders.length;
			if (appenderCount > 0) {
				for (var i = 0; i < appenderCount; i++) {
					appenders[i].setRemovedFromLogger(this);
				}
				appenders.length = 0;
				this.invalidateAppenderCache();
			}
		};

		this.getEffectiveAppenders = function() {
			if (appenderCache === null || appenderCacheInvalidated) {
				// Build appender cache
				var parentEffectiveAppenders = (isRoot || !this.getAdditivity()) ?
					[] : this.parent.getEffectiveAppenders();
				appenderCache = parentEffectiveAppenders.concat(appenders);
				appenderCacheInvalidated = false;
			}
			return appenderCache;
		};
		
		this.invalidateAppenderCache = function() {
			appenderCacheInvalidated = true;
			for (var i = 0, len = this.children.length; i < len; i++) {
				this.children[i].invalidateAppenderCache();
			}
		};

		this.log = function(level, params) {
            if(!(level instanceof Level)) {
                this.log(Level.INFO, arguments);
                return;
            }

			if (enabled && level.isGreaterOrEqual(this.getEffectiveLevel())) {
				// Check whether last param is an exception
				var exception;
				var finalParamIndex = params.length - 1;
				var lastParam = params[finalParamIndex];
				if (params.length > 1 && isError(lastParam)) {
					exception = lastParam;
					finalParamIndex--;
				}

				// Construct genuine array for the params
				var messages = [];
				for (var i = 0; i <= finalParamIndex; i++) {
					messages[i] = params[i];
				}

				var loggingEvent = new LoggingEvent(
					this, new Date(), level, messages, exception);

				this.callAppenders(loggingEvent);
			}
		};

		this.callAppenders = function(loggingEvent) {
			var effectiveAppenders = this.getEffectiveAppenders();
			for (var i = 0, len = effectiveAppenders.length; i < len; i++) {
				effectiveAppenders[i].doAppend(loggingEvent);
			}
		};

		this.setLevel = function(level) {
			// Having a level of null on the root logger would be very bad.
			if (isRoot && level === null) {
				handleError("Logger.setLevel: you cannot set the level of the root logger to null");
			} else if (level instanceof Level) {
				loggerLevel = level;
			} else {
				handleError("Logger.setLevel: level supplied to logger " +
					this.name + " is not an instance of log4javascript.Level");
			}
		};

		this.getLevel = function() {
			return loggerLevel;
		};

		this.getEffectiveLevel = function() {
			for (var logger = this; logger !== null; logger = logger.parent) {
				var level = logger.getLevel();
				if (level !== null) {
					return level;
				}
			}
		};

		this.group = function(name, initiallyExpanded) {
			if (enabled) {
				var effectiveAppenders = this.getEffectiveAppenders();
				for (var i = 0, len = effectiveAppenders.length; i < len; i++) {
					effectiveAppenders[i].group(name, initiallyExpanded);
				}
			}
		};

		this.groupEnd = function() {
			if (enabled) {
				var effectiveAppenders = this.getEffectiveAppenders();
				for (var i = 0, len = effectiveAppenders.length; i < len; i++) {
					effectiveAppenders[i].groupEnd();
				}
			}
		};

		var timers = {};

		this.time = function(name, level) {
			if (enabled) {
				if (isUndefined(name)) {
					handleError("Logger.time: a name for the timer must be supplied");
				} else if (level && !(level instanceof Level)) {
					handleError("Logger.time: level supplied to timer " +
						name + " is not an instance of log4javascript.Level");
				} else {
					timers[name] = new Timer(name, level);
				}
			}
		};

		this.timeEnd = function(name) {
			if (enabled) {
				if (isUndefined(name)) {
					handleError("Logger.timeEnd: a name for the timer must be supplied");
				} else if (timers[name]) {
					var timer = timers[name];
					var milliseconds = timer.getElapsedTime();
					this.log(timer.level, ["Timer " + toStr(name) + " completed in " + milliseconds + "ms"]);
					delete timers[name];
				} else {
					logLog.warn("Logger.timeEnd: no timer found with name " + name);
				}
			}
		};

		this.assert = function(expr) {
			if (enabled && !expr) {
				var args = [];
				for (var i = 1, len = arguments.length; i < len; i++) {
					args.push(arguments[i]);
				}
				args = (args.length > 0) ? args : ["Assertion Failure"];
				args.push(newLine);
				args.push(expr);
				this.log(Level.ERROR, args);
			}
		};

		this.toString = function() {
			return "Logger[" + this.name + "]";
		};
	}

	Logger.prototype = {
		trace: function() {
			this.log(Level.TRACE, arguments);
		},

		debug: function() {
			this.log(Level.DEBUG, arguments);
		},

		info: function() {
			this.log(Level.INFO, arguments);
		},

		warn: function() {
			this.log(Level.WARN, arguments);
		},

		error: function() {
			this.log(Level.ERROR, arguments);
		},

		fatal: function() {
			this.log(Level.FATAL, arguments);
		},

		isEnabledFor: function(level) {
			return level.isGreaterOrEqual(this.getEffectiveLevel());
		},

		isTraceEnabled: function() {
			return this.isEnabledFor(Level.TRACE);
		},

		isDebugEnabled: function() {
			return this.isEnabledFor(Level.DEBUG);
		},

		isInfoEnabled: function() {
			return this.isEnabledFor(Level.INFO);
		},

		isWarnEnabled: function() {
			return this.isEnabledFor(Level.WARN);
		},

		isErrorEnabled: function() {
			return this.isEnabledFor(Level.ERROR);
		},

		isFatalEnabled: function() {
			return this.isEnabledFor(Level.FATAL);
		}
	};

	Logger.prototype.trace.isEntryPoint = true;
	Logger.prototype.debug.isEntryPoint = true;
	Logger.prototype.info.isEntryPoint = true;
	Logger.prototype.warn.isEntryPoint = true;
	Logger.prototype.error.isEntryPoint = true;
	Logger.prototype.fatal.isEntryPoint = true;

	/* ---------------------------------------------------------------------- */
	// Logger access methods

	// Hashtable of loggers keyed by logger name
	var loggers = {};
	var loggerNames = [];

	var ROOT_LOGGER_DEFAULT_LEVEL = Level.DEBUG;
	var rootLogger = new Logger(rootLoggerName);
	rootLogger.setLevel(ROOT_LOGGER_DEFAULT_LEVEL);

	log4javascript.getRootLogger = function() {
		return rootLogger;
	};

	log4javascript.getLogger = function(loggerName) {
		// Use default logger if loggerName is not specified or invalid
		if (typeof loggerName != "string") {
			loggerName = anonymousLoggerName;
			logLog.warn("log4javascript.getLogger: non-string logger name "	+
				toStr(loggerName) + " supplied, returning anonymous logger");
		}

		// Do not allow retrieval of the root logger by name
		if (loggerName == rootLoggerName) {
			handleError("log4javascript.getLogger: root logger may not be obtained by name");
		}

		// Create the logger for this name if it doesn't already exist
		if (!loggers[loggerName]) {
			var logger = new Logger(loggerName);
			loggers[loggerName] = logger;
			loggerNames.push(loggerName);

			// Set up parent logger, if it doesn't exist
			var lastDotIndex = loggerName.lastIndexOf(".");
			var parentLogger;
			if (lastDotIndex > -1) {
				var parentLoggerName = loggerName.substring(0, lastDotIndex);
				parentLogger = log4javascript.getLogger(parentLoggerName); // Recursively sets up grandparents etc.
			} else {
				parentLogger = rootLogger;
			}
			parentLogger.addChild(logger);
		}
		return loggers[loggerName];
	};

	var defaultLogger = null;
	log4javascript.getDefaultLogger = function() {
		if (!defaultLogger) {
			defaultLogger = createDefaultLogger();
		}
		return defaultLogger;
	};

	var nullLogger = null;
	log4javascript.getNullLogger = function() {
		if (!nullLogger) {
			nullLogger = new Logger(nullLoggerName);
			nullLogger.setLevel(Level.OFF);
		}
		return nullLogger;
	};

	// Destroys all loggers
	log4javascript.resetConfiguration = function() {
		rootLogger.setLevel(ROOT_LOGGER_DEFAULT_LEVEL);
		loggers = {};
	};

	/* ---------------------------------------------------------------------- */
	// Logging events

	var LoggingEvent = function(logger, timeStamp, level, messages,
			exception) {
		this.logger = logger;
		this.timeStamp = timeStamp;
		this.timeStampInMilliseconds = timeStamp.getTime();
		this.timeStampInSeconds = Math.floor(this.timeStampInMilliseconds / 1000);
		this.milliseconds = this.timeStamp.getMilliseconds();
		this.level = level;
		this.messages = messages;
		this.exception = exception;
	};

	LoggingEvent.prototype = {
		getThrowableStrRep: function() {
			return this.exception ?
				getExceptionStringRep(this.exception) : "";
		},
		getCombinedMessages: function() {
			return (this.messages.length == 1) ? this.messages[0] :
				   this.messages.join(newLine);
		},
		toString: function() {
			return "LoggingEvent[" + this.level + "]";
		}
	};

	log4javascript.LoggingEvent = LoggingEvent;

	/* ---------------------------------------------------------------------- */
	// Layout prototype

	var Layout = function() {
	};

	Layout.prototype = {
		defaults: {
			loggerKey: "logger",
			timeStampKey: "timestamp",
			millisecondsKey: "milliseconds",
			levelKey: "level",
			messageKey: "message",
			exceptionKey: "exception",
			urlKey: "url"
		},
		loggerKey: "logger",
		timeStampKey: "timestamp",
		millisecondsKey: "milliseconds",
		levelKey: "level",
		messageKey: "message",
		exceptionKey: "exception",
		urlKey: "url",
		batchHeader: "",
		batchFooter: "",
		batchSeparator: "",
		returnsPostData: false,
		overrideTimeStampsSetting: false,
		useTimeStampsInMilliseconds: null,

		format: function() {
			handleError("Layout.format: layout supplied has no format() method");
		},

		ignoresThrowable: function() {
			handleError("Layout.ignoresThrowable: layout supplied has no ignoresThrowable() method");
		},

		getContentType: function() {
			return "text/plain";
		},

		allowBatching: function() {
			return true;
		},

		setTimeStampsInMilliseconds: function(timeStampsInMilliseconds) {
			this.overrideTimeStampsSetting = true;
			this.useTimeStampsInMilliseconds = bool(timeStampsInMilliseconds);
		},

		isTimeStampsInMilliseconds: function() {
			return this.overrideTimeStampsSetting ?
				this.useTimeStampsInMilliseconds : useTimeStampsInMilliseconds;
		},

		getTimeStampValue: function(loggingEvent) {
			return this.isTimeStampsInMilliseconds() ?
				loggingEvent.timeStampInMilliseconds : loggingEvent.timeStampInSeconds;
		},

		getDataValues: function(loggingEvent, combineMessages) {
			var dataValues = [
				[this.loggerKey, loggingEvent.logger.name],
				[this.timeStampKey, this.getTimeStampValue(loggingEvent)],
				[this.levelKey, loggingEvent.level.name],
				[this.urlKey, window.location.href],
				[this.messageKey, combineMessages ? loggingEvent.getCombinedMessages() : loggingEvent.messages]
			];
			if (!this.isTimeStampsInMilliseconds()) {
				dataValues.push([this.millisecondsKey, loggingEvent.milliseconds]);
			}
			if (loggingEvent.exception) {
				dataValues.push([this.exceptionKey, getExceptionStringRep(loggingEvent.exception)]);
			}
			if (this.hasCustomFields()) {
				for (var i = 0, len = this.customFields.length; i < len; i++) {
					var val = this.customFields[i].value;

					// Check if the value is a function. If so, execute it, passing it the
					// current layout and the logging event
					if (typeof val === "function") {
						val = val(this, loggingEvent);
					}
					dataValues.push([this.customFields[i].name, val]);
				}
			}
			return dataValues;
		},

		setKeys: function(loggerKey, timeStampKey, levelKey, messageKey,
				exceptionKey, urlKey, millisecondsKey) {
			this.loggerKey = extractStringFromParam(loggerKey, this.defaults.loggerKey);
			this.timeStampKey = extractStringFromParam(timeStampKey, this.defaults.timeStampKey);
			this.levelKey = extractStringFromParam(levelKey, this.defaults.levelKey);
			this.messageKey = extractStringFromParam(messageKey, this.defaults.messageKey);
			this.exceptionKey = extractStringFromParam(exceptionKey, this.defaults.exceptionKey);
			this.urlKey = extractStringFromParam(urlKey, this.defaults.urlKey);
			this.millisecondsKey = extractStringFromParam(millisecondsKey, this.defaults.millisecondsKey);
		},

		setCustomField: function(name, value) {
			var fieldUpdated = false;
			for (var i = 0, len = this.customFields.length; i < len; i++) {
				if (this.customFields[i].name === name) {
					this.customFields[i].value = value;
					fieldUpdated = true;
				}
			}
			if (!fieldUpdated) {
				this.customFields.push({"name": name, "value": value});
			}
		},

		hasCustomFields: function() {
			return (this.customFields.length > 0);
		},

		formatWithException: function(loggingEvent) {
			var formatted = this.format(loggingEvent);
			if (loggingEvent.exception && this.ignoresThrowable()) {
				formatted += loggingEvent.getThrowableStrRep();
			}
			return formatted;
		},

		toString: function() {
			handleError("Layout.toString: all layouts must override this method");
		}
	};

	log4javascript.Layout = Layout;

	/* ---------------------------------------------------------------------- */
	// Appender prototype

	var Appender = function() {};

	Appender.prototype = new EventSupport();

	Appender.prototype.layout = new PatternLayout();
	Appender.prototype.threshold = Level.ALL;
	Appender.prototype.loggers = [];

	// Performs threshold checks before delegating actual logging to the
	// subclass's specific append method.
	Appender.prototype.doAppend = function(loggingEvent) {
		if (enabled && loggingEvent.level.level >= this.threshold.level) {
			this.append(loggingEvent);
		}
	};

	Appender.prototype.append = function(loggingEvent) {};

	Appender.prototype.setLayout = function(layout) {
		if (layout instanceof Layout) {
			this.layout = layout;
		} else {
			handleError("Appender.setLayout: layout supplied to " +
				this.toString() + " is not a subclass of Layout");
		}
	};

	Appender.prototype.getLayout = function() {
		return this.layout;
	};

	Appender.prototype.setThreshold = function(threshold) {
		if (threshold instanceof Level) {
			this.threshold = threshold;
		} else {
			handleError("Appender.setThreshold: threshold supplied to " +
				this.toString() + " is not a subclass of Level");
		}
	};

	Appender.prototype.getThreshold = function() {
		return this.threshold;
	};

	Appender.prototype.setAddedToLogger = function(logger) {
		this.loggers.push(logger);
	};

	Appender.prototype.setRemovedFromLogger = function(logger) {
		array_remove(this.loggers, logger);
	};

	Appender.prototype.group = emptyFunction;
	Appender.prototype.groupEnd = emptyFunction;

	Appender.prototype.toString = function() {
		handleError("Appender.toString: all appenders must override this method");
	};

	log4javascript.Appender = Appender;

	/* ---------------------------------------------------------------------- */
	// SimpleLayout 

	function SimpleLayout() {
		this.customFields = [];
	}

	SimpleLayout.prototype = new Layout();

	SimpleLayout.prototype.format = function(loggingEvent) {
		return loggingEvent.level.name + " - " + loggingEvent.getCombinedMessages();
	};

	SimpleLayout.prototype.ignoresThrowable = function() {
	    return true;
	};

	SimpleLayout.prototype.toString = function() {
	    return "SimpleLayout";
	};

	log4javascript.SimpleLayout = SimpleLayout;
	/* ----------------------------------------------------------------------- */
	// NullLayout 

	function NullLayout() {
		this.customFields = [];
	}

	NullLayout.prototype = new Layout();

	NullLayout.prototype.format = function(loggingEvent) {
		return loggingEvent.messages;
	};

	NullLayout.prototype.ignoresThrowable = function() {
	    return true;
	};

	NullLayout.prototype.formatWithException = function(loggingEvent) {
		var messages = loggingEvent.messages, ex = loggingEvent.exception;
		return ex ? messages.concat([ex]) : messages;
	};

	NullLayout.prototype.toString = function() {
	    return "NullLayout";
	};

	log4javascript.NullLayout = NullLayout;
/* ---------------------------------------------------------------------- */
	// XmlLayout

	function XmlLayout(combineMessages) {
		this.combineMessages = extractBooleanFromParam(combineMessages, true);
		this.customFields = [];
	}

	XmlLayout.prototype = new Layout();

	XmlLayout.prototype.isCombinedMessages = function() {
		return this.combineMessages;
	};

	XmlLayout.prototype.getContentType = function() {
		return "text/xml";
	};

	XmlLayout.prototype.escapeCdata = function(str) {
		return str.replace(/\]\]>/, "]]>]]&gt;<![CDATA[");
	};

	XmlLayout.prototype.format = function(loggingEvent) {
		var layout = this;
		var i, len;
		function formatMessage(message) {
			message = (typeof message === "string") ? message : toStr(message);
			return "<log4javascript:message><![CDATA[" +
				layout.escapeCdata(message) + "]]></log4javascript:message>";
		}

		var str = "<log4javascript:event logger=\"" + loggingEvent.logger.name +
			"\" timestamp=\"" + this.getTimeStampValue(loggingEvent) + "\"";
		if (!this.isTimeStampsInMilliseconds()) {
			str += " milliseconds=\"" + loggingEvent.milliseconds + "\"";
		}
		str += " level=\"" + loggingEvent.level.name + "\">" + newLine;
		if (this.combineMessages) {
			str += formatMessage(loggingEvent.getCombinedMessages());
		} else {
			str += "<log4javascript:messages>" + newLine;
			for (i = 0, len = loggingEvent.messages.length; i < len; i++) {
				str += formatMessage(loggingEvent.messages[i]) + newLine;
			}
			str += "</log4javascript:messages>" + newLine;
		}
		if (this.hasCustomFields()) {
			for (i = 0, len = this.customFields.length; i < len; i++) {
				str += "<log4javascript:customfield name=\"" +
					this.customFields[i].name + "\"><![CDATA[" +
					this.customFields[i].value.toString() +
					"]]></log4javascript:customfield>" + newLine;
			}
		}
		if (loggingEvent.exception) {
			str += "<log4javascript:exception><![CDATA[" +
				getExceptionStringRep(loggingEvent.exception) +
				"]]></log4javascript:exception>" + newLine;
		}
		str += "</log4javascript:event>" + newLine + newLine;
		return str;
	};

	XmlLayout.prototype.ignoresThrowable = function() {
	    return false;
	};

	XmlLayout.prototype.toString = function() {
	    return "XmlLayout";
	};

	log4javascript.XmlLayout = XmlLayout;
	/* ---------------------------------------------------------------------- */
	// JsonLayout related

	function escapeNewLines(str) {
		return str.replace(/\r\n|\r|\n/g, "\\r\\n");
	}

	function JsonLayout(readable, combineMessages) {
		this.readable = extractBooleanFromParam(readable, false);
		this.combineMessages = extractBooleanFromParam(combineMessages, true);
		this.batchHeader = this.readable ? "[" + newLine : "[";
		this.batchFooter = this.readable ? "]" + newLine : "]";
		this.batchSeparator = this.readable ? "," + newLine : ",";
		this.setKeys();
		this.colon = this.readable ? ": " : ":";
		this.tab = this.readable ? "\t" : "";
		this.lineBreak = this.readable ? newLine : "";
		this.customFields = [];
	}

	/* ---------------------------------------------------------------------- */
	// JsonLayout

	JsonLayout.prototype = new Layout();

	JsonLayout.prototype.isReadable = function() {
		return this.readable;
	};

	JsonLayout.prototype.isCombinedMessages = function() {
		return this.combineMessages;
	};

    JsonLayout.prototype.format = function(loggingEvent) {
        var layout = this;
        var dataValues = this.getDataValues(loggingEvent, this.combineMessages);
        var str = "{" + this.lineBreak;
        var i, len;

        function formatValue(val, prefix, expand) {
            // Check the type of the data value to decide whether quotation marks
            // or expansion are required
            var formattedValue;
            var valType = typeof val;
            if (val instanceof Date) {
                formattedValue = String(val.getTime());
            } else if (expand && (val instanceof Array)) {
                formattedValue = "[" + layout.lineBreak;
                for (var i = 0, len = val.length; i < len; i++) {
                    var childPrefix = prefix + layout.tab;
                    formattedValue += childPrefix + formatValue(val[i], childPrefix, false);
                    if (i < val.length - 1) {
                        formattedValue += ",";
                    }
                    formattedValue += layout.lineBreak;
                }
                formattedValue += prefix + "]";
            } else if (valType !== "number" && valType !== "boolean") {
                formattedValue = "\"" + escapeNewLines(toStr(val).replace(/\"/g, "\\\"")) + "\"";
            } else {
                formattedValue = val;
            }
            return formattedValue;
        }

        for (i = 0, len = dataValues.length - 1; i <= len; i++) {
            str += this.tab + "\"" + dataValues[i][0] + "\"" + this.colon + formatValue(dataValues[i][1], this.tab, true);
            if (i < len) {
                str += ",";
            }
            str += this.lineBreak;
        }

        str += "}" + this.lineBreak;
        return str;
    };

	JsonLayout.prototype.ignoresThrowable = function() {
	    return false;
	};

	JsonLayout.prototype.toString = function() {
	    return "JsonLayout";
	};

	JsonLayout.prototype.getContentType = function() {
		return "application/json";
	};

	log4javascript.JsonLayout = JsonLayout;
	/* ---------------------------------------------------------------------- */
	// HttpPostDataLayout

	function HttpPostDataLayout() {
		this.setKeys();
		this.customFields = [];
		this.returnsPostData = true;
	}

	HttpPostDataLayout.prototype = new Layout();

	// Disable batching
	HttpPostDataLayout.prototype.allowBatching = function() {
		return false;
	};

	HttpPostDataLayout.prototype.format = function(loggingEvent) {
		var dataValues = this.getDataValues(loggingEvent);
		var queryBits = [];
		for (var i = 0, len = dataValues.length; i < len; i++) {
			var val = (dataValues[i][1] instanceof Date) ?
				String(dataValues[i][1].getTime()) : dataValues[i][1];
			queryBits.push(urlEncode(dataValues[i][0]) + "=" + urlEncode(val));
		}
		return queryBits.join("&");
	};

	HttpPostDataLayout.prototype.ignoresThrowable = function(loggingEvent) {
	    return false;
	};

	HttpPostDataLayout.prototype.toString = function() {
	    return "HttpPostDataLayout";
	};

	log4javascript.HttpPostDataLayout = HttpPostDataLayout;
	/* ---------------------------------------------------------------------- */
	// formatObjectExpansion

	function formatObjectExpansion(obj, depth, indentation) {
		var objectsExpanded = [];

		function doFormat(obj, depth, indentation) {
			var i, len, childDepth, childIndentation, childLines, expansion,
				childExpansion;

			if (!indentation) {
				indentation = "";
			}

			function formatString(text) {
				var lines = splitIntoLines(text);
				for (var j = 1, jLen = lines.length; j < jLen; j++) {
					lines[j] = indentation + lines[j];
				}
				return lines.join(newLine);
			}

			if (obj === null) {
				return "null";
			} else if (typeof obj == "undefined") {
				return "undefined";
			} else if (typeof obj == "string") {
				return formatString(obj);
			} else if (typeof obj == "object" && array_contains(objectsExpanded, obj)) {
				try {
					expansion = toStr(obj);
				} catch (ex) {
					expansion = "Error formatting property. Details: " + getExceptionStringRep(ex);
				}
				return expansion + " [already expanded]";
			} else if ((obj instanceof Array) && depth > 0) {
				objectsExpanded.push(obj);
				expansion = "[" + newLine;
				childDepth = depth - 1;
				childIndentation = indentation + "  ";
				childLines = [];
				for (i = 0, len = obj.length; i < len; i++) {
					try {
						childExpansion = doFormat(obj[i], childDepth, childIndentation);
						childLines.push(childIndentation + childExpansion);
					} catch (ex) {
						childLines.push(childIndentation + "Error formatting array member. Details: " +
							getExceptionStringRep(ex) + "");
					}
				}
				expansion += childLines.join("," + newLine) + newLine + indentation + "]";
				return expansion;
            } else if (Object.prototype.toString.call(obj) == "[object Date]") {
                return obj.toString();
			} else if (typeof obj == "object" && depth > 0) {
				objectsExpanded.push(obj);
				expansion = "{" + newLine;
				childDepth = depth - 1;
				childIndentation = indentation + "  ";
				childLines = [];
				for (i in obj) {
					try {
						childExpansion = doFormat(obj[i], childDepth, childIndentation);
						childLines.push(childIndentation + i + ": " + childExpansion);
					} catch (ex) {
						childLines.push(childIndentation + i + ": Error formatting property. Details: " +
							getExceptionStringRep(ex));
					}
				}
				expansion += childLines.join("," + newLine) + newLine + indentation + "}";
				return expansion;
			} else {
				return formatString(toStr(obj));
			}
		}
		return doFormat(obj, depth, indentation);
	}
	/* ---------------------------------------------------------------------- */
	// Date-related stuff

	var SimpleDateFormat;

	(function() {
		var regex = /('[^']*')|(G+|y+|M+|w+|W+|D+|d+|F+|E+|a+|H+|k+|K+|h+|m+|s+|S+|Z+)|([a-zA-Z]+)|([^a-zA-Z']+)/;
		var monthNames = ["January", "February", "March", "April", "May", "June",
			"July", "August", "September", "October", "November", "December"];
		var dayNames = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
		var TEXT2 = 0, TEXT3 = 1, NUMBER = 2, YEAR = 3, MONTH = 4, TIMEZONE = 5;
		var types = {
			G : TEXT2,
			y : YEAR,
			M : MONTH,
			w : NUMBER,
			W : NUMBER,
			D : NUMBER,
			d : NUMBER,
			F : NUMBER,
			E : TEXT3,
			a : TEXT2,
			H : NUMBER,
			k : NUMBER,
			K : NUMBER,
			h : NUMBER,
			m : NUMBER,
			s : NUMBER,
			S : NUMBER,
			Z : TIMEZONE
		};
		var ONE_DAY = 24 * 60 * 60 * 1000;
		var ONE_WEEK = 7 * ONE_DAY;
		var DEFAULT_MINIMAL_DAYS_IN_FIRST_WEEK = 1;

		var newDateAtMidnight = function(year, month, day) {
			var d = new Date(year, month, day, 0, 0, 0);
			d.setMilliseconds(0);
			return d;
		};

		Date.prototype.getDifference = function(date) {
			return this.getTime() - date.getTime();
		};

		Date.prototype.isBefore = function(d) {
			return this.getTime() < d.getTime();
		};

		Date.prototype.getUTCTime = function() {
			return Date.UTC(this.getFullYear(), this.getMonth(), this.getDate(), this.getHours(), this.getMinutes(),
					this.getSeconds(), this.getMilliseconds());
		};

		Date.prototype.getTimeSince = function(d) {
			return this.getUTCTime() - d.getUTCTime();
		};

		Date.prototype.getPreviousSunday = function() {
			// Using midday avoids any possibility of DST messing things up
			var midday = new Date(this.getFullYear(), this.getMonth(), this.getDate(), 12, 0, 0);
			var previousSunday = new Date(midday.getTime() - this.getDay() * ONE_DAY);
			return newDateAtMidnight(previousSunday.getFullYear(), previousSunday.getMonth(),
					previousSunday.getDate());
		};

		Date.prototype.getWeekInYear = function(minimalDaysInFirstWeek) {
			if (isUndefined(this.minimalDaysInFirstWeek)) {
				minimalDaysInFirstWeek = DEFAULT_MINIMAL_DAYS_IN_FIRST_WEEK;
			}
			var previousSunday = this.getPreviousSunday();
			var startOfYear = newDateAtMidnight(this.getFullYear(), 0, 1);
			var numberOfSundays = previousSunday.isBefore(startOfYear) ?
				0 : 1 + Math.floor(previousSunday.getTimeSince(startOfYear) / ONE_WEEK);
			var numberOfDaysInFirstWeek =  7 - startOfYear.getDay();
			var weekInYear = numberOfSundays;
			if (numberOfDaysInFirstWeek < minimalDaysInFirstWeek) {
				weekInYear--;
			}
			return weekInYear;
		};

		Date.prototype.getWeekInMonth = function(minimalDaysInFirstWeek) {
			if (isUndefined(this.minimalDaysInFirstWeek)) {
				minimalDaysInFirstWeek = DEFAULT_MINIMAL_DAYS_IN_FIRST_WEEK;
			}
			var previousSunday = this.getPreviousSunday();
			var startOfMonth = newDateAtMidnight(this.getFullYear(), this.getMonth(), 1);
			var numberOfSundays = previousSunday.isBefore(startOfMonth) ?
				0 : 1 + Math.floor(previousSunday.getTimeSince(startOfMonth) / ONE_WEEK);
			var numberOfDaysInFirstWeek =  7 - startOfMonth.getDay();
			var weekInMonth = numberOfSundays;
			if (numberOfDaysInFirstWeek >= minimalDaysInFirstWeek) {
				weekInMonth++;
			}
			return weekInMonth;
		};

		Date.prototype.getDayInYear = function() {
			var startOfYear = newDateAtMidnight(this.getFullYear(), 0, 1);
			return 1 + Math.floor(this.getTimeSince(startOfYear) / ONE_DAY);
		};

		/* ------------------------------------------------------------------ */

		SimpleDateFormat = function(formatString) {
			this.formatString = formatString;
		};

		/**
		 * Sets the minimum number of days in a week in order for that week to
		 * be considered as belonging to a particular month or year
		 */
		SimpleDateFormat.prototype.setMinimalDaysInFirstWeek = function(days) {
			this.minimalDaysInFirstWeek = days;
		};

		SimpleDateFormat.prototype.getMinimalDaysInFirstWeek = function() {
			return isUndefined(this.minimalDaysInFirstWeek)	?
				DEFAULT_MINIMAL_DAYS_IN_FIRST_WEEK : this.minimalDaysInFirstWeek;
		};

		var padWithZeroes = function(str, len) {
			while (str.length < len) {
				str = "0" + str;
			}
			return str;
		};

		var formatText = function(data, numberOfLetters, minLength) {
			return (numberOfLetters >= 4) ? data : data.substr(0, Math.max(minLength, numberOfLetters));
		};

		var formatNumber = function(data, numberOfLetters) {
			var dataString = "" + data;
			// Pad with 0s as necessary
			return padWithZeroes(dataString, numberOfLetters);
		};

		SimpleDateFormat.prototype.format = function(date) {
			var formattedString = "";
			var result;
			var searchString = this.formatString;
			while ((result = regex.exec(searchString))) {
				var quotedString = result[1];
				var patternLetters = result[2];
				var otherLetters = result[3];
				var otherCharacters = result[4];

				// If the pattern matched is quoted string, output the text between the quotes
				if (quotedString) {
					if (quotedString == "''") {
						formattedString += "'";
					} else {
						formattedString += quotedString.substring(1, quotedString.length - 1);
					}
				} else if (otherLetters) {
					// Swallow non-pattern letters by doing nothing here
				} else if (otherCharacters) {
					// Simply output other characters
					formattedString += otherCharacters;
				} else if (patternLetters) {
					// Replace pattern letters
					var patternLetter = patternLetters.charAt(0);
					var numberOfLetters = patternLetters.length;
					var rawData = "";
					switch(patternLetter) {
						case "G":
							rawData = "AD";
							break;
						case "y":
							rawData = date.getFullYear();
							break;
						case "M":
							rawData = date.getMonth();
							break;
						case "w":
							rawData = date.getWeekInYear(this.getMinimalDaysInFirstWeek());
							break;
						case "W":
							rawData = date.getWeekInMonth(this.getMinimalDaysInFirstWeek());
							break;
						case "D":
							rawData = date.getDayInYear();
							break;
						case "d":
							rawData = date.getDate();
							break;
						case "F":
							rawData = 1 + Math.floor((date.getDate() - 1) / 7);
							break;
						case "E":
							rawData = dayNames[date.getDay()];
							break;
						case "a":
							rawData = (date.getHours() >= 12) ? "PM" : "AM";
							break;
						case "H":
							rawData = date.getHours();
							break;
						case "k":
							rawData = date.getHours() || 24;
							break;
						case "K":
							rawData = date.getHours() % 12;
							break;
						case "h":
							rawData = (date.getHours() % 12) || 12;
							break;
						case "m":
							rawData = date.getMinutes();
							break;
						case "s":
							rawData = date.getSeconds();
							break;
						case "S":
							rawData = date.getMilliseconds();
							break;
						case "Z":
							rawData = date.getTimezoneOffset(); // This returns the number of minutes since GMT was this time.
							break;
					}
					// Format the raw data depending on the type
					switch(types[patternLetter]) {
						case TEXT2:
							formattedString += formatText(rawData, numberOfLetters, 2);
							break;
						case TEXT3:
							formattedString += formatText(rawData, numberOfLetters, 3);
							break;
						case NUMBER:
							formattedString += formatNumber(rawData, numberOfLetters);
							break;
						case YEAR:
							if (numberOfLetters <= 3) {
								// Output a 2-digit year
								var dataString = "" + rawData;
								formattedString += dataString.substr(2, 2);
							} else {
								formattedString += formatNumber(rawData, numberOfLetters);
							}
							break;
						case MONTH:
							if (numberOfLetters >= 3) {
								formattedString += formatText(monthNames[rawData], numberOfLetters, numberOfLetters);
							} else {
								// NB. Months returned by getMonth are zero-based
								formattedString += formatNumber(rawData + 1, numberOfLetters);
							}
							break;
						case TIMEZONE:
							var isPositive = (rawData > 0);
							// The following line looks like a mistake but isn't
							// because of the way getTimezoneOffset measures.
							var prefix = isPositive ? "-" : "+";
							var absData = Math.abs(rawData);

							// Hours
							var hours = "" + Math.floor(absData / 60);
							hours = padWithZeroes(hours, 2);
							// Minutes
							var minutes = "" + (absData % 60);
							minutes = padWithZeroes(minutes, 2);

							formattedString += prefix + hours + minutes;
							break;
					}
				}
				searchString = searchString.substr(result.index + result[0].length);
			}
			return formattedString;
		};
	})();

	log4javascript.SimpleDateFormat = SimpleDateFormat;

	/* ---------------------------------------------------------------------- */
	// PatternLayout

	function PatternLayout(pattern) {
		if (pattern) {
			this.pattern = pattern;
		} else {
			this.pattern = PatternLayout.DEFAULT_CONVERSION_PATTERN;
		}
		this.customFields = [];
	}

	PatternLayout.TTCC_CONVERSION_PATTERN = "%r %p %c - %m%n";
	PatternLayout.DEFAULT_CONVERSION_PATTERN = "%m%n";
	PatternLayout.ISO8601_DATEFORMAT = "yyyy-MM-dd HH:mm:ss,SSS";
	PatternLayout.DATETIME_DATEFORMAT = "dd MMM yyyy HH:mm:ss,SSS";
	PatternLayout.ABSOLUTETIME_DATEFORMAT = "HH:mm:ss,SSS";

	PatternLayout.prototype = new Layout();

	PatternLayout.prototype.format = function(loggingEvent) {
		var regex = /%(-?[0-9]+)?(\.?[0-9]+)?([acdfmMnpr%])(\{([^\}]+)\})?|([^%]+)/;
		var formattedString = "";
		var result;
		var searchString = this.pattern;

		// Cannot use regex global flag since it doesn't work with exec in IE5
		while ((result = regex.exec(searchString))) {
			var matchedString = result[0];
			var padding = result[1];
			var truncation = result[2];
			var conversionCharacter = result[3];
			var specifier = result[5];
			var text = result[6];

			// Check if the pattern matched was just normal text
			if (text) {
				formattedString += "" + text;
			} else {
				// Create a raw replacement string based on the conversion
				// character and specifier
				var replacement = "";
				switch(conversionCharacter) {
					case "a": // Array of messages
					case "m": // Message
						var depth = 0;
						if (specifier) {
							depth = parseInt(specifier, 10);
							if (isNaN(depth)) {
								handleError("PatternLayout.format: invalid specifier '" +
									specifier + "' for conversion character '" + conversionCharacter +
									"' - should be a number");
								depth = 0;
							}
						}
						var messages = (conversionCharacter === "a") ? loggingEvent.messages[0] : loggingEvent.messages;
						for (var i = 0, len = messages.length; i < len; i++) {
							if (i > 0 && (replacement.charAt(replacement.length - 1) !== " ")) {
								replacement += " ";
							}
							if (depth === 0) {
								replacement += messages[i];
							} else {
								replacement += formatObjectExpansion(messages[i], depth);
							}
						}
						break;
					case "c": // Logger name
						var loggerName = loggingEvent.logger.name;
						if (specifier) {
							var precision = parseInt(specifier, 10);
							var loggerNameBits = loggingEvent.logger.name.split(".");
							if (precision >= loggerNameBits.length) {
								replacement = loggerName;
							} else {
								replacement = loggerNameBits.slice(loggerNameBits.length - precision).join(".");
							}
						} else {
							replacement = loggerName;
						}
						break;
					case "d": // Date
						var dateFormat = PatternLayout.ISO8601_DATEFORMAT;
						if (specifier) {
							dateFormat = specifier;
							// Pick up special cases
							if (dateFormat == "ISO8601") {
								dateFormat = PatternLayout.ISO8601_DATEFORMAT;
							} else if (dateFormat == "ABSOLUTE") {
								dateFormat = PatternLayout.ABSOLUTETIME_DATEFORMAT;
							} else if (dateFormat == "DATE") {
								dateFormat = PatternLayout.DATETIME_DATEFORMAT;
							}
						}
						// Format the date
						replacement = (new SimpleDateFormat(dateFormat)).format(loggingEvent.timeStamp);
						break;
					case "f": // Custom field
						if (this.hasCustomFields()) {
							var fieldIndex = 0;
							if (specifier) {
								fieldIndex = parseInt(specifier, 10);
								if (isNaN(fieldIndex)) {
									handleError("PatternLayout.format: invalid specifier '" +
										specifier + "' for conversion character 'f' - should be a number");
								} else if (fieldIndex === 0) {
									handleError("PatternLayout.format: invalid specifier '" +
										specifier + "' for conversion character 'f' - must be greater than zero");
								} else if (fieldIndex > this.customFields.length) {
									handleError("PatternLayout.format: invalid specifier '" +
										specifier + "' for conversion character 'f' - there aren't that many custom fields");
								} else {
									fieldIndex = fieldIndex - 1;
								}
							}
                            var val = this.customFields[fieldIndex].value;
                            if (typeof val == "function") {
                                val = val(this, loggingEvent);
                            }
                            replacement = val;
						}
						break;
					case "n": // New line
						replacement = newLine;
						break;
					case "p": // Level
						replacement = loggingEvent.level.name;
						break;
					case "r": // Milliseconds since log4javascript startup
						replacement = "" + loggingEvent.timeStamp.getDifference(applicationStartDate);
						break;
					case "%": // Literal % sign
						replacement = "%";
						break;
					default:
						replacement = matchedString;
						break;
				}
				// Format the replacement according to any padding or
				// truncation specified
				var l;

				// First, truncation
				if (truncation) {
					l = parseInt(truncation.substr(1), 10);
					var strLen = replacement.length;
					if (l < strLen) {
						replacement = replacement.substring(strLen - l, strLen);
					}
				}
				// Next, padding
				if (padding) {
					if (padding.charAt(0) == "-") {
						l = parseInt(padding.substr(1), 10);
						// Right pad with spaces
						while (replacement.length < l) {
							replacement += " ";
						}
					} else {
						l = parseInt(padding, 10);
						// Left pad with spaces
						while (replacement.length < l) {
							replacement = " " + replacement;
						}
					}
				}
				formattedString += replacement;
			}
			searchString = searchString.substr(result.index + result[0].length);
		}
		return formattedString;
	};

	PatternLayout.prototype.ignoresThrowable = function() {
	    return true;
	};

	PatternLayout.prototype.toString = function() {
	    return "PatternLayout";
	};

	log4javascript.PatternLayout = PatternLayout;
	/* ---------------------------------------------------------------------- */
	// AlertAppender

	function AlertAppender() {}

	AlertAppender.prototype = new Appender();

	AlertAppender.prototype.layout = new SimpleLayout();

	AlertAppender.prototype.append = function(loggingEvent) {
		alert( this.getLayout().formatWithException(loggingEvent) );
	};

	AlertAppender.prototype.toString = function() {
		return "AlertAppender";
	};

	log4javascript.AlertAppender = AlertAppender;
	/* ---------------------------------------------------------------------- */
	// BrowserConsoleAppender (only works in Opera and Safari and Firefox with
	// Firebug extension)

	function BrowserConsoleAppender() {}

	BrowserConsoleAppender.prototype = new log4javascript.Appender();
	BrowserConsoleAppender.prototype.layout = new NullLayout();
	BrowserConsoleAppender.prototype.threshold = Level.DEBUG;

	BrowserConsoleAppender.prototype.append = function(loggingEvent) {
		var appender = this;

		var getFormattedMessage = function() {
			var formattedMessage = appender.getLayout().formatWithException(loggingEvent);
			return (typeof formattedMessage == "string") ? [formattedMessage] : formattedMessage;
		};

		var console;

		if ( (console = window.console) && console.log) { // Safari and Firebug
			var formattedMessage = getFormattedMessage();

			// Log to Firebug or the browser console using specific logging
			// methods or revert to console.log otherwise 
			var consoleMethodName;

			if (console.debug && Level.DEBUG.isGreaterOrEqual(loggingEvent.level)) {
				consoleMethodName = "debug";
			} else if (console.info && Level.INFO.equals(loggingEvent.level)) {
				consoleMethodName = "info";
			} else if (console.warn && Level.WARN.equals(loggingEvent.level)) {
				consoleMethodName = "warn";
			} else if (console.error && loggingEvent.level.isGreaterOrEqual(Level.ERROR)) {
				consoleMethodName = "error";
			} else {
				consoleMethodName = "log";
			}

			if (console[consoleMethodName].apply) {
				console[consoleMethodName].apply(console, formattedMessage);
			} else {
				console[consoleMethodName](formattedMessage);
			}
		} else if ((typeof opera != "undefined") && opera.postError) { // Opera
			opera.postError(getFormattedMessage());
		}
	};

	BrowserConsoleAppender.prototype.group = function(name) {
		if (window.console && window.console.group) {
			window.console.group(name);
		}
	};

	BrowserConsoleAppender.prototype.groupEnd = function() {
		if (window.console && window.console.groupEnd) {
			window.console.groupEnd();
		}
	};

	BrowserConsoleAppender.prototype.toString = function() {
		return "BrowserConsoleAppender";
	};

	log4javascript.BrowserConsoleAppender = BrowserConsoleAppender;
	/* ---------------------------------------------------------------------- */
	// AjaxAppender related

	var xhrFactory = function() { return new XMLHttpRequest(); };
	var xmlHttpFactories = [
		xhrFactory,
		function() { return new ActiveXObject("Msxml2.XMLHTTP"); },
		function() { return new ActiveXObject("Microsoft.XMLHTTP"); }
	];

	var withCredentialsSupported = false;
	var getXmlHttp = function(errorHandler) {
		// This is only run the first time; the value of getXmlHttp gets
		// replaced with the factory that succeeds on the first run
		var xmlHttp = null, factory;
		for (var i = 0, len = xmlHttpFactories.length; i < len; i++) {
			factory = xmlHttpFactories[i];
			try {
				xmlHttp = factory();
				withCredentialsSupported = (factory == xhrFactory && ("withCredentials" in xmlHttp));
				getXmlHttp = factory;
				return xmlHttp;
			} catch (e) {
			}
		}
		// If we're here, all factories have failed, so throw an error
		if (errorHandler) {
			errorHandler();
		} else {
			handleError("getXmlHttp: unable to obtain XMLHttpRequest object");
		}
	};

	function isHttpRequestSuccessful(xmlHttp) {
		return isUndefined(xmlHttp.status) || xmlHttp.status === 0 ||
			(xmlHttp.status >= 200 && xmlHttp.status < 300) ||
			xmlHttp.status == 1223 /* Fix for IE */;
	}

	/* ---------------------------------------------------------------------- */
	// AjaxAppender

	function AjaxAppender(url, withCredentials) {
		var appender = this;
		var isSupported = true;
		if (!url) {
			handleError("AjaxAppender: URL must be specified in constructor");
			isSupported = false;
		}

		var timed = this.defaults.timed;
		var waitForResponse = this.defaults.waitForResponse;
		var batchSize = this.defaults.batchSize;
		var timerInterval = this.defaults.timerInterval;
		var requestSuccessCallback = this.defaults.requestSuccessCallback;
		var failCallback = this.defaults.failCallback;
		var postVarName = this.defaults.postVarName;
		var sendAllOnUnload = this.defaults.sendAllOnUnload;
		var contentType = this.defaults.contentType;
		var sessionId = null;

		var queuedLoggingEvents = [];
		var queuedRequests = [];
		var headers = [];
		var sending = false;
		var initialized = false;

		// Configuration methods. The function scope is used to prevent
		// direct alteration to the appender configuration properties.
		function checkCanConfigure(configOptionName) {
			if (initialized) {
				handleError("AjaxAppender: configuration option '" +
					configOptionName +
					"' may not be set after the appender has been initialized");
				return false;
			}
			return true;
		}

		this.getSessionId = function() { return sessionId; };
		this.setSessionId = function(sessionIdParam) {
			sessionId = extractStringFromParam(sessionIdParam, null);
			this.layout.setCustomField("sessionid", sessionId);
		};

		this.setLayout = function(layoutParam) {
			if (checkCanConfigure("layout")) {
				this.layout = layoutParam;
				// Set the session id as a custom field on the layout, if not already present
				if (sessionId !== null) {
					this.setSessionId(sessionId);
				}
			}
		};

		this.isTimed = function() { return timed; };
		this.setTimed = function(timedParam) {
			if (checkCanConfigure("timed")) {
				timed = bool(timedParam);
			}
		};

		this.getTimerInterval = function() { return timerInterval; };
		this.setTimerInterval = function(timerIntervalParam) {
			if (checkCanConfigure("timerInterval")) {
				timerInterval = extractIntFromParam(timerIntervalParam, timerInterval);
			}
		};

		this.isWaitForResponse = function() { return waitForResponse; };
		this.setWaitForResponse = function(waitForResponseParam) {
			if (checkCanConfigure("waitForResponse")) {
				waitForResponse = bool(waitForResponseParam);
			}
		};

		this.getBatchSize = function() { return batchSize; };
		this.setBatchSize = function(batchSizeParam) {
			if (checkCanConfigure("batchSize")) {
				batchSize = extractIntFromParam(batchSizeParam, batchSize);
			}
		};

		this.isSendAllOnUnload = function() { return sendAllOnUnload; };
		this.setSendAllOnUnload = function(sendAllOnUnloadParam) {
			if (checkCanConfigure("sendAllOnUnload")) {
				sendAllOnUnload = extractBooleanFromParam(sendAllOnUnloadParam, sendAllOnUnload);
			}
		};

		this.setRequestSuccessCallback = function(requestSuccessCallbackParam) {
			requestSuccessCallback = extractFunctionFromParam(requestSuccessCallbackParam, requestSuccessCallback);
		};

		this.setFailCallback = function(failCallbackParam) {
			failCallback = extractFunctionFromParam(failCallbackParam, failCallback);
		};

		this.getPostVarName = function() { return postVarName; };
		this.setPostVarName = function(postVarNameParam) {
			if (checkCanConfigure("postVarName")) {
				postVarName = extractStringFromParam(postVarNameParam, postVarName);
			}
		};

		this.getHeaders = function() { return headers; };
		this.addHeader = function(name, value) {
			if (name.toLowerCase() == "content-type") {
				contentType = value;
			} else {
				headers.push( { name: name, value: value } );
			}
		};

		// Internal functions
		function sendAll() {
			if (isSupported && enabled) {
				sending = true;
				var currentRequestBatch;
				if (waitForResponse) {
					// Send the first request then use this function as the callback once
					// the response comes back
					if (queuedRequests.length > 0) {
						currentRequestBatch = queuedRequests.shift();
						sendRequest(preparePostData(currentRequestBatch), sendAll);
					} else {
						sending = false;
						if (timed) {
							scheduleSending();
						}
					}
				} else {
					// Rattle off all the requests without waiting to see the response
					while ((currentRequestBatch = queuedRequests.shift())) {
						sendRequest(preparePostData(currentRequestBatch));
					}
					sending = false;
					if (timed) {
						scheduleSending();
					}
				}
			}
		}

		this.sendAll = sendAll;

		// Called when the window unloads. At this point we're past caring about
		// waiting for responses or timers or incomplete batches - everything
		// must go, now
		function sendAllRemaining() {
			var sendingAnything = false;
			if (isSupported && enabled) {
				// Create requests for everything left over, batched as normal
				var actualBatchSize = appender.getLayout().allowBatching() ? batchSize : 1;
				var currentLoggingEvent;
				var batchedLoggingEvents = [];
				while ((currentLoggingEvent = queuedLoggingEvents.shift())) {
					batchedLoggingEvents.push(currentLoggingEvent);
					if (queuedLoggingEvents.length >= actualBatchSize) {
						// Queue this batch of log entries
						queuedRequests.push(batchedLoggingEvents);
						batchedLoggingEvents = [];
					}
				}
				// If there's a partially completed batch, add it
				if (batchedLoggingEvents.length > 0) {
					queuedRequests.push(batchedLoggingEvents);
				}
				sendingAnything = (queuedRequests.length > 0);
				waitForResponse = false;
				timed = false;
				sendAll();
			}
			return sendingAnything;
		}

		this.sendAllRemaining = sendAllRemaining;

		function preparePostData(batchedLoggingEvents) {
			// Format the logging events
			var formattedMessages = [];
			var currentLoggingEvent;
			var postData = "";
			while ((currentLoggingEvent = batchedLoggingEvents.shift())) {
				formattedMessages.push( appender.getLayout().formatWithException(currentLoggingEvent) );
			}
			// Create the post data string
			if (batchedLoggingEvents.length == 1) {
				postData = formattedMessages.join("");
			} else {
				postData = appender.getLayout().batchHeader +
					formattedMessages.join(appender.getLayout().batchSeparator) +
					appender.getLayout().batchFooter;
			}
			if (contentType == appender.defaults.contentType) {
				postData = appender.getLayout().returnsPostData ? postData :
					urlEncode(postVarName) + "=" + urlEncode(postData);
				// Add the layout name to the post data
				if (postData.length > 0) {
					postData += "&";
				}
				postData += "layout=" + urlEncode(appender.getLayout().toString());
			}
			return postData;
		}

		function scheduleSending() {
			window.setTimeout(sendAll, timerInterval);
		}

		function xmlHttpErrorHandler() {
			var msg = "AjaxAppender: could not create XMLHttpRequest object. AjaxAppender disabled";
			handleError(msg);
			isSupported = false;
			if (failCallback) {
				failCallback(msg);
			}
		}

		function sendRequest(postData, successCallback) {
			try {
				var xmlHttp = getXmlHttp(xmlHttpErrorHandler);
				if (isSupported) {
					xmlHttp.onreadystatechange = function() {
						if (xmlHttp.readyState == 4) {
							if (isHttpRequestSuccessful(xmlHttp)) {
								if (requestSuccessCallback) {
									requestSuccessCallback(xmlHttp);
								}
								if (successCallback) {
									successCallback(xmlHttp);
								}
							} else {
								var msg = "AjaxAppender.append: XMLHttpRequest request to URL " +
									url + " returned status code " + xmlHttp.status;
								handleError(msg);
								if (failCallback) {
									failCallback(msg);
								}
							}
							xmlHttp.onreadystatechange = emptyFunction;
							xmlHttp = null;
						}
					};
					xmlHttp.open("POST", url, true);
					// Add withCredentials to facilitate CORS requests with cookies
					if (withCredentials && withCredentialsSupported) {
						xmlHttp.withCredentials = true;
					}
					try {
						for (var i = 0, header; header = headers[i++]; ) {
							xmlHttp.setRequestHeader(header.name, header.value);
						}
						xmlHttp.setRequestHeader("Content-Type", contentType);
					} catch (headerEx) {
						var msg = "AjaxAppender.append: your browser's XMLHttpRequest implementation" +
							" does not support setRequestHeader, therefore cannot post data. AjaxAppender disabled";
						handleError(msg);
						isSupported = false;
						if (failCallback) {
							failCallback(msg);
						}
						return;
					}
					xmlHttp.send(postData);
				}
			} catch (ex) {
				var errMsg = "AjaxAppender.append: error sending log message to " + url;
				handleError(errMsg, ex);
				isSupported = false;
				if (failCallback) {
					failCallback(errMsg + ". Details: " + getExceptionStringRep(ex));
				}
			}
		}

		this.append = function(loggingEvent) {
			if (isSupported) {
				if (!initialized) {
					init();
				}
				queuedLoggingEvents.push(loggingEvent);
				var actualBatchSize = this.getLayout().allowBatching() ? batchSize : 1;

				if (queuedLoggingEvents.length >= actualBatchSize) {
					var currentLoggingEvent;
					var batchedLoggingEvents = [];
					while ((currentLoggingEvent = queuedLoggingEvents.shift())) {
						batchedLoggingEvents.push(currentLoggingEvent);
					}
					// Queue this batch of log entries
					queuedRequests.push(batchedLoggingEvents);

					// If using a timer, the queue of requests will be processed by the
					// timer function, so nothing needs to be done here.
					if (!timed && (!waitForResponse || (waitForResponse && !sending))) {
						sendAll();
					}
				}
			}
		};

		function init() {
			initialized = true;
			// Add unload event to send outstanding messages
			if (sendAllOnUnload) {
				var oldBeforeUnload = window.onbeforeunload;
				window.onbeforeunload = function() {
					if (oldBeforeUnload) {
						oldBeforeUnload();
					}
					sendAllRemaining();
				};
			}
			// Start timer
			if (timed) {
				scheduleSending();
			}
		}
	}

	AjaxAppender.prototype = new Appender();

	AjaxAppender.prototype.defaults = {
		waitForResponse: false,
		timed: false,
		timerInterval: 1000,
		batchSize: 1,
		sendAllOnUnload: false,
		requestSuccessCallback: null,
		failCallback: null,
		postVarName: "data",
		contentType: "application/x-www-form-urlencoded"
	};

	AjaxAppender.prototype.layout = new HttpPostDataLayout();

	AjaxAppender.prototype.toString = function() {
		return "AjaxAppender";
	};

	log4javascript.AjaxAppender = AjaxAppender;
	/* ---------------------------------------------------------------------- */
	// PopUpAppender and InPageAppender related

	function setCookie(name, value, days, path) {
		var expires;
		path = path ? "; path=" + path : "";
		if (days) {
			var date = new Date();
			date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
			expires = "; expires=" + date.toGMTString();
		} else {
			expires = "";
		}
		document.cookie = escape(name) + "=" + escape(value) + expires + path;
	}

	function getCookie(name) {
		var nameEquals = escape(name) + "=";
		var ca = document.cookie.split(";");
		for (var i = 0, len = ca.length; i < len; i++) {
			var c = ca[i];
			while (c.charAt(0) === " ") {
				c = c.substring(1, c.length);
			}
			if (c.indexOf(nameEquals) === 0) {
				return unescape(c.substring(nameEquals.length, c.length));
			}
		}
		return null;
	}

	// Gets the base URL of the location of the log4javascript script.
	// This is far from infallible.
	function getBaseUrl() {
		var scripts = document.getElementsByTagName("script");
		for (var i = 0, len = scripts.length; i < len; ++i) {
			if (scripts[i].src.indexOf("log4javascript") != -1) {
				var lastSlash = scripts[i].src.lastIndexOf("/");
				return (lastSlash == -1) ? "" : scripts[i].src.substr(0, lastSlash + 1);
			}
		}
		return null;
	}

	function isLoaded(win) {
		try {
			return bool(win.loaded);
		} catch (ex) {
			return false;
		}
	}

	/* ---------------------------------------------------------------------- */
	// ConsoleAppender (prototype for PopUpAppender and InPageAppender)

	var ConsoleAppender;

	// Create an anonymous function to protect base console methods
	(function() {
		var getConsoleHtmlLines = function() {
			return [
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">',
'<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">',
'	<head>',
'		<title>log4javascript</title>',
'		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />',
'		<!-- Make IE8 behave like IE7, having gone to all the trouble of making IE work -->',
'		<meta http-equiv="X-UA-Compatible" content="IE=7" />',
'		<script type="text/javascript">var isIe = false, isIePre7 = false;</script>',
'		<!--[if IE]><script type="text/javascript">isIe = true</script><![endif]-->',
'		<!--[if lt IE 7]><script type="text/javascript">isIePre7 = true</script><![endif]-->',
'		<script type="text/javascript">',
'			//<![CDATA[',
'			var loggingEnabled = true;',
'			var logQueuedEventsTimer = null;',
'			var logEntries = [];',
'			var logEntriesAndSeparators = [];',
'			var logItems = [];',
'			var renderDelay = 100;',
'			var unrenderedLogItemsExist = false;',
'			var rootGroup, currentGroup = null;',
'			var loaded = false;',
'			var currentLogItem = null;',
'			var logMainContainer;',
'',
'			function copyProperties(obj, props) {',
'				for (var i in props) {',
'					obj[i] = props[i];',
'				}',
'			}',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogItem() {',
'			}',
'',
'			LogItem.prototype = {',
'				mainContainer: null,',
'				wrappedContainer: null,',
'				unwrappedContainer: null,',
'				group: null,',
'',
'				appendToLog: function() {',
'					for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'						this.elementContainers[i].appendToLog();',
'					}',
'					this.group.update();',
'				},',
'',
'				doRemove: function(doUpdate, removeFromGroup) {',
'					if (this.rendered) {',
'						for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'							this.elementContainers[i].remove();',
'						}',
'						this.unwrappedElementContainer = null;',
'						this.wrappedElementContainer = null;',
'						this.mainElementContainer = null;',
'					}',
'					if (this.group && removeFromGroup) {',
'						this.group.removeChild(this, doUpdate);',
'					}',
'					if (this === currentLogItem) {',
'						currentLogItem = null;',
'					}',
'				},',
'',
'				remove: function(doUpdate, removeFromGroup) {',
'					this.doRemove(doUpdate, removeFromGroup);',
'				},',
'',
'				render: function() {},',
'',
'				accept: function(visitor) {',
'					visitor.visit(this);',
'				},',
'',
'				getUnwrappedDomContainer: function() {',
'					return this.group.unwrappedElementContainer.contentDiv;',
'				},',
'',
'				getWrappedDomContainer: function() {',
'					return this.group.wrappedElementContainer.contentDiv;',
'				},',
'',
'				getMainDomContainer: function() {',
'					return this.group.mainElementContainer.contentDiv;',
'				}',
'			};',
'',
'			LogItem.serializedItemKeys = {LOG_ENTRY: 0, GROUP_START: 1, GROUP_END: 2};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogItemContainerElement() {',
'			}',
'',
'			LogItemContainerElement.prototype = {',
'				appendToLog: function() {',
'					var insertBeforeFirst = (newestAtTop && this.containerDomNode.hasChildNodes());',
'					if (insertBeforeFirst) {',
'						this.containerDomNode.insertBefore(this.mainDiv, this.containerDomNode.firstChild);',
'					} else {',
'						this.containerDomNode.appendChild(this.mainDiv);',
'					}',
'				}',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function SeparatorElementContainer(containerDomNode) {',
'				this.containerDomNode = containerDomNode;',
'				this.mainDiv = document.createElement("div");',
'				this.mainDiv.className = "separator";',
'				this.mainDiv.innerHTML = "&nbsp;";',
'			}',
'',
'			SeparatorElementContainer.prototype = new LogItemContainerElement();',
'',
'			SeparatorElementContainer.prototype.remove = function() {',
'				this.mainDiv.parentNode.removeChild(this.mainDiv);',
'				this.mainDiv = null;',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function Separator() {',
'				this.rendered = false;',
'			}',
'',
'			Separator.prototype = new LogItem();',
'',
'			copyProperties(Separator.prototype, {',
'				render: function() {',
'					var containerDomNode = this.group.contentDiv;',
'					if (isIe) {',
'						this.unwrappedElementContainer = new SeparatorElementContainer(this.getUnwrappedDomContainer());',
'						this.wrappedElementContainer = new SeparatorElementContainer(this.getWrappedDomContainer());',
'						this.elementContainers = [this.unwrappedElementContainer, this.wrappedElementContainer];',
'					} else {',
'						this.mainElementContainer = new SeparatorElementContainer(this.getMainDomContainer());',
'						this.elementContainers = [this.mainElementContainer];',
'					}',
'					this.content = this.formattedMessage;',
'					this.rendered = true;',
'				}',
'			});',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function GroupElementContainer(group, containerDomNode, isRoot, isWrapped) {',
'				this.group = group;',
'				this.containerDomNode = containerDomNode;',
'				this.isRoot = isRoot;',
'				this.isWrapped = isWrapped;',
'				this.expandable = false;',
'',
'				if (this.isRoot) {',
'					if (isIe) {',
'						this.contentDiv = logMainContainer.appendChild(document.createElement("div"));',
'						this.contentDiv.id = this.isWrapped ? "log_wrapped" : "log_unwrapped";',
'					} else {',
'						this.contentDiv = logMainContainer;',
'					}',
'				} else {',
'					var groupElementContainer = this;',
'					',
'					this.mainDiv = document.createElement("div");',
'					this.mainDiv.className = "group";',
'',
'					this.headingDiv = this.mainDiv.appendChild(document.createElement("div"));',
'					this.headingDiv.className = "groupheading";',
'',
'					this.expander = this.headingDiv.appendChild(document.createElement("span"));',
'					this.expander.className = "expander unselectable greyedout";',
'					this.expander.unselectable = true;',
'					var expanderText = this.group.expanded ? "-" : "+";',
'					this.expanderTextNode = this.expander.appendChild(document.createTextNode(expanderText));',
'					',
'					this.headingDiv.appendChild(document.createTextNode(" " + this.group.name));',
'',
'					this.contentDiv = this.mainDiv.appendChild(document.createElement("div"));',
'					var contentCssClass = this.group.expanded ? "expanded" : "collapsed";',
'					this.contentDiv.className = "groupcontent " + contentCssClass;',
'',
'					this.expander.onclick = function() {',
'						if (groupElementContainer.group.expandable) {',
'							groupElementContainer.group.toggleExpanded();',
'						}',
'					};',
'				}',
'			}',
'',
'			GroupElementContainer.prototype = new LogItemContainerElement();',
'',
'			copyProperties(GroupElementContainer.prototype, {',
'				toggleExpanded: function() {',
'					if (!this.isRoot) {',
'						var oldCssClass, newCssClass, expanderText;',
'						if (this.group.expanded) {',
'							newCssClass = "expanded";',
'							oldCssClass = "collapsed";',
'							expanderText = "-";',
'						} else {',
'							newCssClass = "collapsed";',
'							oldCssClass = "expanded";',
'							expanderText = "+";',
'						}',
'						replaceClass(this.contentDiv, newCssClass, oldCssClass);',
'						this.expanderTextNode.nodeValue = expanderText;',
'					}',
'				},',
'',
'				remove: function() {',
'					if (!this.isRoot) {',
'						this.headingDiv = null;',
'						this.expander.onclick = null;',
'						this.expander = null;',
'						this.expanderTextNode = null;',
'						this.contentDiv = null;',
'						this.containerDomNode = null;',
'						this.mainDiv.parentNode.removeChild(this.mainDiv);',
'						this.mainDiv = null;',
'					}',
'				},',
'',
'				reverseChildren: function() {',
'					// Invert the order of the log entries',
'					var node = null;',
'',
'					// Remove all the log container nodes',
'					var childDomNodes = [];',
'					while ((node = this.contentDiv.firstChild)) {',
'						this.contentDiv.removeChild(node);',
'						childDomNodes.push(node);',
'					}',
'',
'					// Put them all back in reverse order',
'					while ((node = childDomNodes.pop())) {',
'						this.contentDiv.appendChild(node);',
'					}',
'				},',
'',
'				update: function() {',
'					if (!this.isRoot) {',
'						if (this.group.expandable) {',
'							removeClass(this.expander, "greyedout");',
'						} else {',
'							addClass(this.expander, "greyedout");',
'						}',
'					}',
'				},',
'',
'				clear: function() {',
'					if (this.isRoot) {',
'						this.contentDiv.innerHTML = "";',
'					}',
'				}',
'			});',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function Group(name, isRoot, initiallyExpanded) {',
'				this.name = name;',
'				this.group = null;',
'				this.isRoot = isRoot;',
'				this.initiallyExpanded = initiallyExpanded;',
'				this.elementContainers = [];',
'				this.children = [];',
'				this.expanded = initiallyExpanded;',
'				this.rendered = false;',
'				this.expandable = false;',
'			}',
'',
'			Group.prototype = new LogItem();',
'',
'			copyProperties(Group.prototype, {',
'				addChild: function(logItem) {',
'					this.children.push(logItem);',
'					logItem.group = this;',
'				},',
'',
'				render: function() {',
'					if (isIe) {',
'						var unwrappedDomContainer, wrappedDomContainer;',
'						if (this.isRoot) {',
'							unwrappedDomContainer = logMainContainer;',
'							wrappedDomContainer = logMainContainer;',
'						} else {',
'							unwrappedDomContainer = this.getUnwrappedDomContainer();',
'							wrappedDomContainer = this.getWrappedDomContainer();',
'						}',
'						this.unwrappedElementContainer = new GroupElementContainer(this, unwrappedDomContainer, this.isRoot, false);',
'						this.wrappedElementContainer = new GroupElementContainer(this, wrappedDomContainer, this.isRoot, true);',
'						this.elementContainers = [this.unwrappedElementContainer, this.wrappedElementContainer];',
'					} else {',
'						var mainDomContainer = this.isRoot ? logMainContainer : this.getMainDomContainer();',
'						this.mainElementContainer = new GroupElementContainer(this, mainDomContainer, this.isRoot, false);',
'						this.elementContainers = [this.mainElementContainer];',
'					}',
'					this.rendered = true;',
'				},',
'',
'				toggleExpanded: function() {',
'					this.expanded = !this.expanded;',
'					for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'						this.elementContainers[i].toggleExpanded();',
'					}',
'				},',
'',
'				expand: function() {',
'					if (!this.expanded) {',
'						this.toggleExpanded();',
'					}',
'				},',
'',
'				accept: function(visitor) {',
'					visitor.visitGroup(this);',
'				},',
'',
'				reverseChildren: function() {',
'					if (this.rendered) {',
'						for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'							this.elementContainers[i].reverseChildren();',
'						}',
'					}',
'				},',
'',
'				update: function() {',
'					var previouslyExpandable = this.expandable;',
'					this.expandable = (this.children.length !== 0);',
'					if (this.expandable !== previouslyExpandable) {',
'						for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'							this.elementContainers[i].update();',
'						}',
'					}',
'				},',
'',
'				flatten: function() {',
'					var visitor = new GroupFlattener();',
'					this.accept(visitor);',
'					return visitor.logEntriesAndSeparators;',
'				},',
'',
'				removeChild: function(child, doUpdate) {',
'					array_remove(this.children, child);',
'					child.group = null;',
'					if (doUpdate) {',
'						this.update();',
'					}',
'				},',
'',
'				remove: function(doUpdate, removeFromGroup) {',
'					for (var i = 0, len = this.children.length; i < len; i++) {',
'						this.children[i].remove(false, false);',
'					}',
'					this.children = [];',
'					this.update();',
'					if (this === currentGroup) {',
'						currentGroup = this.group;',
'					}',
'					this.doRemove(doUpdate, removeFromGroup);',
'				},',
'',
'				serialize: function(items) {',
'					items.push([LogItem.serializedItemKeys.GROUP_START, this.name]);',
'					for (var i = 0, len = this.children.length; i < len; i++) {',
'						this.children[i].serialize(items);',
'					}',
'					if (this !== currentGroup) {',
'						items.push([LogItem.serializedItemKeys.GROUP_END]);',
'					}',
'				},',
'',
'				clear: function() {',
'					for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'						this.elementContainers[i].clear();',
'					}',
'				}',
'			});',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogEntryElementContainer() {',
'			}',
'',
'			LogEntryElementContainer.prototype = new LogItemContainerElement();',
'',
'			copyProperties(LogEntryElementContainer.prototype, {',
'				remove: function() {',
'					this.doRemove();',
'				},',
'',
'				doRemove: function() {',
'					this.mainDiv.parentNode.removeChild(this.mainDiv);',
'					this.mainDiv = null;',
'					this.contentElement = null;',
'					this.containerDomNode = null;',
'				},',
'',
'				setContent: function(content, wrappedContent) {',
'					if (content === this.formattedMessage) {',
'						this.contentElement.innerHTML = "";',
'						this.contentElement.appendChild(document.createTextNode(this.formattedMessage));',
'					} else {',
'						this.contentElement.innerHTML = content;',
'					}',
'				},',
'',
'				setSearchMatch: function(isMatch) {',
'					var oldCssClass = isMatch ? "searchnonmatch" : "searchmatch";',
'					var newCssClass = isMatch ? "searchmatch" : "searchnonmatch";',
'					replaceClass(this.mainDiv, newCssClass, oldCssClass);',
'				},',
'',
'				clearSearch: function() {',
'					removeClass(this.mainDiv, "searchmatch");',
'					removeClass(this.mainDiv, "searchnonmatch");',
'				}',
'			});',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogEntryWrappedElementContainer(logEntry, containerDomNode) {',
'				this.logEntry = logEntry;',
'				this.containerDomNode = containerDomNode;',
'				this.mainDiv = document.createElement("div");',
'				this.mainDiv.appendChild(document.createTextNode(this.logEntry.formattedMessage));',
'				this.mainDiv.className = "logentry wrapped " + this.logEntry.level;',
'				this.contentElement = this.mainDiv;',
'			}',
'',
'			LogEntryWrappedElementContainer.prototype = new LogEntryElementContainer();',
'',
'			LogEntryWrappedElementContainer.prototype.setContent = function(content, wrappedContent) {',
'				if (content === this.formattedMessage) {',
'					this.contentElement.innerHTML = "";',
'					this.contentElement.appendChild(document.createTextNode(this.formattedMessage));',
'				} else {',
'					this.contentElement.innerHTML = wrappedContent;',
'				}',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogEntryUnwrappedElementContainer(logEntry, containerDomNode) {',
'				this.logEntry = logEntry;',
'				this.containerDomNode = containerDomNode;',
'				this.mainDiv = document.createElement("div");',
'				this.mainDiv.className = "logentry unwrapped " + this.logEntry.level;',
'				this.pre = this.mainDiv.appendChild(document.createElement("pre"));',
'				this.pre.appendChild(document.createTextNode(this.logEntry.formattedMessage));',
'				this.pre.className = "unwrapped";',
'				this.contentElement = this.pre;',
'			}',
'',
'			LogEntryUnwrappedElementContainer.prototype = new LogEntryElementContainer();',
'',
'			LogEntryUnwrappedElementContainer.prototype.remove = function() {',
'				this.doRemove();',
'				this.pre = null;',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogEntryMainElementContainer(logEntry, containerDomNode) {',
'				this.logEntry = logEntry;',
'				this.containerDomNode = containerDomNode;',
'				this.mainDiv = document.createElement("div");',
'				this.mainDiv.className = "logentry nonielogentry " + this.logEntry.level;',
'				this.contentElement = this.mainDiv.appendChild(document.createElement("span"));',
'				this.contentElement.appendChild(document.createTextNode(this.logEntry.formattedMessage));',
'			}',
'',
'			LogEntryMainElementContainer.prototype = new LogEntryElementContainer();',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogEntry(level, formattedMessage) {',
'				this.level = level;',
'				this.formattedMessage = formattedMessage;',
'				this.rendered = false;',
'			}',
'',
'			LogEntry.prototype = new LogItem();',
'',
'			copyProperties(LogEntry.prototype, {',
'				render: function() {',
'					var logEntry = this;',
'					var containerDomNode = this.group.contentDiv;',
'',
'					// Support for the CSS attribute white-space in IE for Windows is',
'					// non-existent pre version 6 and slightly odd in 6, so instead',
'					// use two different HTML elements',
'					if (isIe) {',
'						this.formattedMessage = this.formattedMessage.replace(/\\r\\n/g, "\\r"); // Workaround for IE\'s treatment of white space',
'						this.unwrappedElementContainer = new LogEntryUnwrappedElementContainer(this, this.getUnwrappedDomContainer());',
'						this.wrappedElementContainer = new LogEntryWrappedElementContainer(this, this.getWrappedDomContainer());',
'						this.elementContainers = [this.unwrappedElementContainer, this.wrappedElementContainer];',
'					} else {',
'						this.mainElementContainer = new LogEntryMainElementContainer(this, this.getMainDomContainer());',
'						this.elementContainers = [this.mainElementContainer];',
'					}',
'					this.content = this.formattedMessage;',
'					this.rendered = true;',
'				},',
'',
'				setContent: function(content, wrappedContent) {',
'					if (content != this.content) {',
'						if (isIe && (content !== this.formattedMessage)) {',
'							content = content.replace(/\\r\\n/g, "\\r"); // Workaround for IE\'s treatment of white space',
'						}',
'						for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'							this.elementContainers[i].setContent(content, wrappedContent);',
'						}',
'						this.content = content;',
'					}',
'				},',
'',
'				getSearchMatches: function() {',
'					var matches = [];',
'					var i, len;',
'					if (isIe) {',
'						var unwrappedEls = getElementsByClass(this.unwrappedElementContainer.mainDiv, "searchterm", "span");',
'						var wrappedEls = getElementsByClass(this.wrappedElementContainer.mainDiv, "searchterm", "span");',
'						for (i = 0, len = unwrappedEls.length; i < len; i++) {',
'							matches[i] = new Match(this.level, null, unwrappedEls[i], wrappedEls[i]);',
'						}',
'					} else {',
'						var els = getElementsByClass(this.mainElementContainer.mainDiv, "searchterm", "span");',
'						for (i = 0, len = els.length; i < len; i++) {',
'							matches[i] = new Match(this.level, els[i]);',
'						}',
'					}',
'					return matches;',
'				},',
'',
'				setSearchMatch: function(isMatch) {',
'					for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'						this.elementContainers[i].setSearchMatch(isMatch);',
'					}',
'				},',
'',
'				clearSearch: function() {',
'					for (var i = 0, len = this.elementContainers.length; i < len; i++) {',
'						this.elementContainers[i].clearSearch();',
'					}',
'				},',
'',
'				accept: function(visitor) {',
'					visitor.visitLogEntry(this);',
'				},',
'',
'				serialize: function(items) {',
'					items.push([LogItem.serializedItemKeys.LOG_ENTRY, this.level, this.formattedMessage]);',
'				}',
'			});',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogItemVisitor() {',
'			}',
'',
'			LogItemVisitor.prototype = {',
'				visit: function(logItem) {',
'				},',
'',
'				visitParent: function(logItem) {',
'					if (logItem.group) {',
'						logItem.group.accept(this);',
'					}',
'				},',
'',
'				visitChildren: function(logItem) {',
'					for (var i = 0, len = logItem.children.length; i < len; i++) {',
'						logItem.children[i].accept(this);',
'					}',
'				},',
'',
'				visitLogEntry: function(logEntry) {',
'					this.visit(logEntry);',
'				},',
'',
'				visitSeparator: function(separator) {',
'					this.visit(separator);',
'				},',
'',
'				visitGroup: function(group) {',
'					this.visit(group);',
'				}',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function GroupFlattener() {',
'				this.logEntriesAndSeparators = [];',
'			}',
'',
'			GroupFlattener.prototype = new LogItemVisitor();',
'',
'			GroupFlattener.prototype.visitGroup = function(group) {',
'				this.visitChildren(group);',
'			};',
'',
'			GroupFlattener.prototype.visitLogEntry = function(logEntry) {',
'				this.logEntriesAndSeparators.push(logEntry);',
'			};',
'',
'			GroupFlattener.prototype.visitSeparator = function(separator) {',
'				this.logEntriesAndSeparators.push(separator);',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			window.onload = function() {',
'				// Sort out document.domain',
'				if (location.search) {',
'					var queryBits = unescape(location.search).substr(1).split("&"), nameValueBits;',
'					for (var i = 0, len = queryBits.length; i < len; i++) {',
'						nameValueBits = queryBits[i].split("=");',
'						if (nameValueBits[0] == "log4javascript_domain") {',
'							document.domain = nameValueBits[1];',
'							break;',
'						}',
'					}',
'				}',
'',
'				// Create DOM objects',
'				logMainContainer = $("log");',
'				if (isIePre7) {',
'					addClass(logMainContainer, "oldIe");',
'				}',
'',
'				rootGroup = new Group("root", true);',
'				rootGroup.render();',
'				currentGroup = rootGroup;',
'				',
'				setCommandInputWidth();',
'				setLogContainerHeight();',
'				toggleLoggingEnabled();',
'				toggleSearchEnabled();',
'				toggleSearchFilter();',
'				toggleSearchHighlight();',
'				applyFilters();',
'				checkAllLevels();',
'				toggleWrap();',
'				toggleNewestAtTop();',
'				toggleScrollToLatest();',
'				renderQueuedLogItems();',
'				loaded = true;',
'				$("command").value = "";',
'				$("command").autocomplete = "off";',
'				$("command").onkeydown = function(evt) {',
'					evt = getEvent(evt);',
'					if (evt.keyCode == 10 || evt.keyCode == 13) { // Return/Enter',
'						evalCommandLine();',
'						stopPropagation(evt);',
'					} else if (evt.keyCode == 27) { // Escape',
'						this.value = "";',
'						this.focus();',
'					} else if (evt.keyCode == 38 && commandHistory.length > 0) { // Up',
'						currentCommandIndex = Math.max(0, currentCommandIndex - 1);',
'						this.value = commandHistory[currentCommandIndex];',
'						moveCaretToEnd(this);',
'					} else if (evt.keyCode == 40 && commandHistory.length > 0) { // Down',
'						currentCommandIndex = Math.min(commandHistory.length - 1, currentCommandIndex + 1);',
'						this.value = commandHistory[currentCommandIndex];',
'						moveCaretToEnd(this);',
'					}',
'				};',
'',
'				// Prevent the keypress moving the caret in Firefox',
'				$("command").onkeypress = function(evt) {',
'					evt = getEvent(evt);',
'					if (evt.keyCode == 38 && commandHistory.length > 0 && evt.preventDefault) { // Up',
'						evt.preventDefault();',
'					}',
'				};',
'',
'				// Prevent the keyup event blurring the input in Opera',
'				$("command").onkeyup = function(evt) {',
'					evt = getEvent(evt);',
'					if (evt.keyCode == 27 && evt.preventDefault) { // Up',
'						evt.preventDefault();',
'						this.focus();',
'					}',
'				};',
'',
'				// Add document keyboard shortcuts',
'				document.onkeydown = function keyEventHandler(evt) {',
'					evt = getEvent(evt);',
'					switch (evt.keyCode) {',
'						case 69: // Ctrl + shift + E: re-execute last command',
'							if (evt.shiftKey && (evt.ctrlKey || evt.metaKey)) {',
'								evalLastCommand();',
'								cancelKeyEvent(evt);',
'								return false;',
'							}',
'							break;',
'						case 75: // Ctrl + shift + K: focus search',
'							if (evt.shiftKey && (evt.ctrlKey || evt.metaKey)) {',
'								focusSearch();',
'								cancelKeyEvent(evt);',
'								return false;',
'							}',
'							break;',
'						case 40: // Ctrl + shift + down arrow: focus command line',
'						case 76: // Ctrl + shift + L: focus command line',
'							if (evt.shiftKey && (evt.ctrlKey || evt.metaKey)) {',
'								focusCommandLine();',
'								cancelKeyEvent(evt);',
'								return false;',
'							}',
'							break;',
'					}',
'				};',
'',
'				// Workaround to make sure log div starts at the correct size',
'				setTimeout(setLogContainerHeight, 20);',
'',
'				setShowCommandLine(showCommandLine);',
'				doSearch();',
'			};',
'',
'			window.onunload = function() {',
'				if (mainWindowExists()) {',
'					appender.unload();',
'				}',
'				appender = null;',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function toggleLoggingEnabled() {',
'				setLoggingEnabled($("enableLogging").checked);',
'			}',
'',
'			function setLoggingEnabled(enable) {',
'				loggingEnabled = enable;',
'			}',
'',
'			var appender = null;',
'',
'			function setAppender(appenderParam) {',
'				appender = appenderParam;',
'			}',
'',
'			function setShowCloseButton(showCloseButton) {',
'				$("closeButton").style.display = showCloseButton ? "inline" : "none";',
'			}',
'',
'			function setShowHideButton(showHideButton) {',
'				$("hideButton").style.display = showHideButton ? "inline" : "none";',
'			}',
'',
'			var newestAtTop = false;',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function LogItemContentReverser() {',
'			}',
'			',
'			LogItemContentReverser.prototype = new LogItemVisitor();',
'			',
'			LogItemContentReverser.prototype.visitGroup = function(group) {',
'				group.reverseChildren();',
'				this.visitChildren(group);',
'			};',
'',
'			/*----------------------------------------------------------------*/',
'',
'			function setNewestAtTop(isNewestAtTop) {',
'				var oldNewestAtTop = newestAtTop;',
'				var i, iLen, j, jLen;',
'				newestAtTop = Boolean(isNewestAtTop);',
'				if (oldNewestAtTop != newestAtTop) {',
'					var visitor = new LogItemContentReverser();',
'					rootGroup.accept(visitor);',
'',
'					// Reassemble the matches array',
'					if (currentSearch) {',
'						var currentMatch = currentSearch.matches[currentMatchIndex];',
'						var matchIndex = 0;',
'						var matches = [];',
'						var actOnLogEntry = function(logEntry) {',
'							var logEntryMatches = logEntry.getSearchMatches();',
'							for (j = 0, jLen = logEntryMatches.length; j < jLen; j++) {',
'								matches[matchIndex] = logEntryMatches[j];',
'								if (currentMatch && logEntryMatches[j].equals(currentMatch)) {',
'									currentMatchIndex = matchIndex;',
'								}',
'								matchIndex++;',
'							}',
'						};',
'						if (newestAtTop) {',
'							for (i = logEntries.length - 1; i >= 0; i--) {',
'								actOnLogEntry(logEntries[i]);',
'							}',
'						} else {',
'							for (i = 0, iLen = logEntries.length; i < iLen; i++) {',
'								actOnLogEntry(logEntries[i]);',
'							}',
'						}',
'						currentSearch.matches = matches;',
'						if (currentMatch) {',
'							currentMatch.setCurrent();',
'						}',
'					} else if (scrollToLatest) {',
'						doScrollToLatest();',
'					}',
'				}',
'				$("newestAtTop").checked = isNewestAtTop;',
'			}',
'',
'			function toggleNewestAtTop() {',
'				var isNewestAtTop = $("newestAtTop").checked;',
'				setNewestAtTop(isNewestAtTop);',
'			}',
'',
'			var scrollToLatest = true;',
'',
'			function setScrollToLatest(isScrollToLatest) {',
'				scrollToLatest = isScrollToLatest;',
'				if (scrollToLatest) {',
'					doScrollToLatest();',
'				}',
'				$("scrollToLatest").checked = isScrollToLatest;',
'			}',
'',
'			function toggleScrollToLatest() {',
'				var isScrollToLatest = $("scrollToLatest").checked;',
'				setScrollToLatest(isScrollToLatest);',
'			}',
'',
'			function doScrollToLatest() {',
'				var l = logMainContainer;',
'				if (typeof l.scrollTop != "undefined") {',
'					if (newestAtTop) {',
'						l.scrollTop = 0;',
'					} else {',
'						var latestLogEntry = l.lastChild;',
'						if (latestLogEntry) {',
'							l.scrollTop = l.scrollHeight;',
'						}',
'					}',
'				}',
'			}',
'',
'			var closeIfOpenerCloses = true;',
'',
'			function setCloseIfOpenerCloses(isCloseIfOpenerCloses) {',
'				closeIfOpenerCloses = isCloseIfOpenerCloses;',
'			}',
'',
'			var maxMessages = null;',
'',
'			function setMaxMessages(max) {',
'				maxMessages = max;',
'				pruneLogEntries();',
'			}',
'',
'			var showCommandLine = false;',
'',
'			function setShowCommandLine(isShowCommandLine) {',
'				showCommandLine = isShowCommandLine;',
'				if (loaded) {',
'					$("commandLine").style.display = showCommandLine ? "block" : "none";',
'					setCommandInputWidth();',
'					setLogContainerHeight();',
'				}',
'			}',
'',
'			function focusCommandLine() {',
'				if (loaded) {',
'					$("command").focus();',
'				}',
'			}',
'',
'			function focusSearch() {',
'				if (loaded) {',
'					$("searchBox").focus();',
'				}',
'			}',
'',
'			function getLogItems() {',
'				var items = [];',
'				for (var i = 0, len = logItems.length; i < len; i++) {',
'					logItems[i].serialize(items);',
'				}',
'				return items;',
'			}',
'',
'			function setLogItems(items) {',
'				var loggingReallyEnabled = loggingEnabled;',
'				// Temporarily turn logging on',
'				loggingEnabled = true;',
'				for (var i = 0, len = items.length; i < len; i++) {',
'					switch (items[i][0]) {',
'						case LogItem.serializedItemKeys.LOG_ENTRY:',
'							log(items[i][1], items[i][2]);',
'							break;',
'						case LogItem.serializedItemKeys.GROUP_START:',
'							group(items[i][1]);',
'							break;',
'						case LogItem.serializedItemKeys.GROUP_END:',
'							groupEnd();',
'							break;',
'					}',
'				}',
'				loggingEnabled = loggingReallyEnabled;',
'			}',
'',
'			function log(logLevel, formattedMessage) {',
'				if (loggingEnabled) {',
'					var logEntry = new LogEntry(logLevel, formattedMessage);',
'					logEntries.push(logEntry);',
'					logEntriesAndSeparators.push(logEntry);',
'					logItems.push(logEntry);',
'					currentGroup.addChild(logEntry);',
'					if (loaded) {',
'						if (logQueuedEventsTimer !== null) {',
'							clearTimeout(logQueuedEventsTimer);',
'						}',
'						logQueuedEventsTimer = setTimeout(renderQueuedLogItems, renderDelay);',
'						unrenderedLogItemsExist = true;',
'					}',
'				}',
'			}',
'',
'			function renderQueuedLogItems() {',
'				logQueuedEventsTimer = null;',
'				var pruned = pruneLogEntries();',
'',
'				// Render any unrendered log entries and apply the current search to them',
'				var initiallyHasMatches = currentSearch ? currentSearch.hasMatches() : false;',
'				for (var i = 0, len = logItems.length; i < len; i++) {',
'					if (!logItems[i].rendered) {',
'						logItems[i].render();',
'						logItems[i].appendToLog();',
'						if (currentSearch && (logItems[i] instanceof LogEntry)) {',
'							currentSearch.applyTo(logItems[i]);',
'						}',
'					}',
'				}',
'				if (currentSearch) {',
'					if (pruned) {',
'						if (currentSearch.hasVisibleMatches()) {',
'							if (currentMatchIndex === null) {',
'								setCurrentMatchIndex(0);',
'							}',
'							displayMatches();',
'						} else {',
'							displayNoMatches();',
'						}',
'					} else if (!initiallyHasMatches && currentSearch.hasVisibleMatches()) {',
'						setCurrentMatchIndex(0);',
'						displayMatches();',
'					}',
'				}',
'				if (scrollToLatest) {',
'					doScrollToLatest();',
'				}',
'				unrenderedLogItemsExist = false;',
'			}',
'',
'			function pruneLogEntries() {',
'				if ((maxMessages !== null) && (logEntriesAndSeparators.length > maxMessages)) {',
'					var numberToDelete = logEntriesAndSeparators.length - maxMessages;',
'					var prunedLogEntries = logEntriesAndSeparators.slice(0, numberToDelete);',
'					if (currentSearch) {',
'						currentSearch.removeMatches(prunedLogEntries);',
'					}',
'					var group;',
'					for (var i = 0; i < numberToDelete; i++) {',
'						group = logEntriesAndSeparators[i].group;',
'						array_remove(logItems, logEntriesAndSeparators[i]);',
'						array_remove(logEntries, logEntriesAndSeparators[i]);',
'						logEntriesAndSeparators[i].remove(true, true);',
'						if (group.children.length === 0 && group !== currentGroup && group !== rootGroup) {',
'							array_remove(logItems, group);',
'							group.remove(true, true);',
'						}',
'					}',
'					logEntriesAndSeparators = array_removeFromStart(logEntriesAndSeparators, numberToDelete);',
'					return true;',
'				}',
'				return false;',
'			}',
'',
'			function group(name, startExpanded) {',
'				if (loggingEnabled) {',
'					initiallyExpanded = (typeof startExpanded === "undefined") ? true : Boolean(startExpanded);',
'					var newGroup = new Group(name, false, initiallyExpanded);',
'					currentGroup.addChild(newGroup);',
'					currentGroup = newGroup;',
'					logItems.push(newGroup);',
'					if (loaded) {',
'						if (logQueuedEventsTimer !== null) {',
'							clearTimeout(logQueuedEventsTimer);',
'						}',
'						logQueuedEventsTimer = setTimeout(renderQueuedLogItems, renderDelay);',
'						unrenderedLogItemsExist = true;',
'					}',
'				}',
'			}',
'',
'			function groupEnd() {',
'				currentGroup = (currentGroup === rootGroup) ? rootGroup : currentGroup.group;',
'			}',
'',
'			function mainPageReloaded() {',
'				currentGroup = rootGroup;',
'				var separator = new Separator();',
'				logEntriesAndSeparators.push(separator);',
'				logItems.push(separator);',
'				currentGroup.addChild(separator);',
'			}',
'',
'			function closeWindow() {',
'				if (appender && mainWindowExists()) {',
'					appender.close(true);',
'				} else {',
'					window.close();',
'				}',
'			}',
'',
'			function hide() {',
'				if (appender && mainWindowExists()) {',
'					appender.hide();',
'				}',
'			}',
'',
'			var mainWindow = window;',
'			var windowId = "log4javascriptConsoleWindow_" + new Date().getTime() + "_" + ("" + Math.random()).substr(2);',
'',
'			function setMainWindow(win) {',
'				mainWindow = win;',
'				mainWindow[windowId] = window;',
'				// If this is a pop-up, poll the opener to see if it\'s closed',
'				if (opener && closeIfOpenerCloses) {',
'					pollOpener();',
'				}',
'			}',
'',
'			function pollOpener() {',
'				if (closeIfOpenerCloses) {',
'					if (mainWindowExists()) {',
'						setTimeout(pollOpener, 500);',
'					} else {',
'						closeWindow();',
'					}',
'				}',
'			}',
'',
'			function mainWindowExists() {',
'				try {',
'					return (mainWindow && !mainWindow.closed &&',
'						mainWindow[windowId] == window);',
'				} catch (ex) {}',
'				return false;',
'			}',
'',
'			var logLevels = ["TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"];',
'',
'			function getCheckBox(logLevel) {',
'				return $("switch_" + logLevel);',
'			}',
'',
'			function getIeWrappedLogContainer() {',
'				return $("log_wrapped");',
'			}',
'',
'			function getIeUnwrappedLogContainer() {',
'				return $("log_unwrapped");',
'			}',
'',
'			function applyFilters() {',
'				for (var i = 0; i < logLevels.length; i++) {',
'					if (getCheckBox(logLevels[i]).checked) {',
'						addClass(logMainContainer, logLevels[i]);',
'					} else {',
'						removeClass(logMainContainer, logLevels[i]);',
'					}',
'				}',
'				updateSearchFromFilters();',
'			}',
'',
'			function toggleAllLevels() {',
'				var turnOn = $("switch_ALL").checked;',
'				for (var i = 0; i < logLevels.length; i++) {',
'					getCheckBox(logLevels[i]).checked = turnOn;',
'					if (turnOn) {',
'						addClass(logMainContainer, logLevels[i]);',
'					} else {',
'						removeClass(logMainContainer, logLevels[i]);',
'					}',
'				}',
'			}',
'',
'			function checkAllLevels() {',
'				for (var i = 0; i < logLevels.length; i++) {',
'					if (!getCheckBox(logLevels[i]).checked) {',
'						getCheckBox("ALL").checked = false;',
'						return;',
'					}',
'				}',
'				getCheckBox("ALL").checked = true;',
'			}',
'',
'			function clearLog() {',
'				rootGroup.clear();',
'				currentGroup = rootGroup;',
'				logEntries = [];',
'				logItems = [];',
'				logEntriesAndSeparators = [];',
' 				doSearch();',
'			}',
'',
'			function toggleWrap() {',
'				var enable = $("wrap").checked;',
'				if (enable) {',
'					addClass(logMainContainer, "wrap");',
'				} else {',
'					removeClass(logMainContainer, "wrap");',
'				}',
'				refreshCurrentMatch();',
'			}',
'',
'			/* ------------------------------------------------------------------- */',
'',
'			// Search',
'',
'			var searchTimer = null;',
'',
'			function scheduleSearch() {',
'				try {',
'					clearTimeout(searchTimer);',
'				} catch (ex) {',
'					// Do nothing',
'				}',
'				searchTimer = setTimeout(doSearch, 500);',
'			}',
'',
'			function Search(searchTerm, isRegex, searchRegex, isCaseSensitive) {',
'				this.searchTerm = searchTerm;',
'				this.isRegex = isRegex;',
'				this.searchRegex = searchRegex;',
'				this.isCaseSensitive = isCaseSensitive;',
'				this.matches = [];',
'			}',
'',
'			Search.prototype = {',
'				hasMatches: function() {',
'					return this.matches.length > 0;',
'				},',
'',
'				hasVisibleMatches: function() {',
'					if (this.hasMatches()) {',
'						for (var i = 0; i < this.matches.length; i++) {',
'							if (this.matches[i].isVisible()) {',
'								return true;',
'							}',
'						}',
'					}',
'					return false;',
'				},',
'',
'				match: function(logEntry) {',
'					var entryText = String(logEntry.formattedMessage);',
'					var matchesSearch = false;',
'					if (this.isRegex) {',
'						matchesSearch = this.searchRegex.test(entryText);',
'					} else if (this.isCaseSensitive) {',
'						matchesSearch = (entryText.indexOf(this.searchTerm) > -1);',
'					} else {',
'						matchesSearch = (entryText.toLowerCase().indexOf(this.searchTerm.toLowerCase()) > -1);',
'					}',
'					return matchesSearch;',
'				},',
'',
'				getNextVisibleMatchIndex: function() {',
'					for (var i = currentMatchIndex + 1; i < this.matches.length; i++) {',
'						if (this.matches[i].isVisible()) {',
'							return i;',
'						}',
'					}',
'					// Start again from the first match',
'					for (i = 0; i <= currentMatchIndex; i++) {',
'						if (this.matches[i].isVisible()) {',
'							return i;',
'						}',
'					}',
'					return -1;',
'				},',
'',
'				getPreviousVisibleMatchIndex: function() {',
'					for (var i = currentMatchIndex - 1; i >= 0; i--) {',
'						if (this.matches[i].isVisible()) {',
'							return i;',
'						}',
'					}',
'					// Start again from the last match',
'					for (var i = this.matches.length - 1; i >= currentMatchIndex; i--) {',
'						if (this.matches[i].isVisible()) {',
'							return i;',
'						}',
'					}',
'					return -1;',
'				},',
'',
'				applyTo: function(logEntry) {',
'					var doesMatch = this.match(logEntry);',
'					if (doesMatch) {',
'						logEntry.group.expand();',
'						logEntry.setSearchMatch(true);',
'						var logEntryContent;',
'						var wrappedLogEntryContent;',
'						var searchTermReplacementStartTag = "<span class=\\\"searchterm\\\">";',
'						var searchTermReplacementEndTag = "<" + "/span>";',
'						var preTagName = isIe ? "pre" : "span";',
'						var preStartTag = "<" + preTagName + " class=\\\"pre\\\">";',
'						var preEndTag = "<" + "/" + preTagName + ">";',
'						var startIndex = 0;',
'						var searchIndex, matchedText, textBeforeMatch;',
'						if (this.isRegex) {',
'							var flags = this.isCaseSensitive ? "g" : "gi";',
'							var capturingRegex = new RegExp("(" + this.searchRegex.source + ")", flags);',
'',
'							// Replace the search term with temporary tokens for the start and end tags',
'							var rnd = ("" + Math.random()).substr(2);',
'							var startToken = "%%s" + rnd + "%%";',
'							var endToken = "%%e" + rnd + "%%";',
'							logEntryContent = logEntry.formattedMessage.replace(capturingRegex, startToken + "$1" + endToken);',
'',
'							// Escape the HTML to get rid of angle brackets',
'							logEntryContent = escapeHtml(logEntryContent);',
'',
'							// Substitute the proper HTML back in for the search match',
'							var result;',
'							var searchString = logEntryContent;',
'							logEntryContent = "";',
'							wrappedLogEntryContent = "";',
'							while ((searchIndex = searchString.indexOf(startToken, startIndex)) > -1) {',
'								var endTokenIndex = searchString.indexOf(endToken, searchIndex);',
'								matchedText = searchString.substring(searchIndex + startToken.length, endTokenIndex);',
'								textBeforeMatch = searchString.substring(startIndex, searchIndex);',
'								logEntryContent += preStartTag + textBeforeMatch + preEndTag;',
'								logEntryContent += searchTermReplacementStartTag + preStartTag + matchedText +',
'									preEndTag + searchTermReplacementEndTag;',
'								if (isIe) {',
'									wrappedLogEntryContent += textBeforeMatch + searchTermReplacementStartTag +',
'										matchedText + searchTermReplacementEndTag;',
'								}',
'								startIndex = endTokenIndex + endToken.length;',
'							}',
'							logEntryContent += preStartTag + searchString.substr(startIndex) + preEndTag;',
'							if (isIe) {',
'								wrappedLogEntryContent += searchString.substr(startIndex);',
'							}',
'						} else {',
'							logEntryContent = "";',
'							wrappedLogEntryContent = "";',
'							var searchTermReplacementLength = searchTermReplacementStartTag.length +',
'								this.searchTerm.length + searchTermReplacementEndTag.length;',
'							var searchTermLength = this.searchTerm.length;',
'							var searchTermLowerCase = this.searchTerm.toLowerCase();',
'							var logTextLowerCase = logEntry.formattedMessage.toLowerCase();',
'							while ((searchIndex = logTextLowerCase.indexOf(searchTermLowerCase, startIndex)) > -1) {',
'								matchedText = escapeHtml(logEntry.formattedMessage.substr(searchIndex, this.searchTerm.length));',
'								textBeforeMatch = escapeHtml(logEntry.formattedMessage.substring(startIndex, searchIndex));',
'								var searchTermReplacement = searchTermReplacementStartTag +',
'									preStartTag + matchedText + preEndTag + searchTermReplacementEndTag;',
'								logEntryContent += preStartTag + textBeforeMatch + preEndTag + searchTermReplacement;',
'								if (isIe) {',
'									wrappedLogEntryContent += textBeforeMatch + searchTermReplacementStartTag +',
'										matchedText + searchTermReplacementEndTag;',
'								}',
'								startIndex = searchIndex + searchTermLength;',
'							}',
'							var textAfterLastMatch = escapeHtml(logEntry.formattedMessage.substr(startIndex));',
'							logEntryContent += preStartTag + textAfterLastMatch + preEndTag;',
'							if (isIe) {',
'								wrappedLogEntryContent += textAfterLastMatch;',
'							}',
'						}',
'						logEntry.setContent(logEntryContent, wrappedLogEntryContent);',
'						var logEntryMatches = logEntry.getSearchMatches();',
'						this.matches = this.matches.concat(logEntryMatches);',
'					} else {',
'						logEntry.setSearchMatch(false);',
'						logEntry.setContent(logEntry.formattedMessage, logEntry.formattedMessage);',
'					}',
'					return doesMatch;',
'				},',
'',
'				removeMatches: function(logEntries) {',
'					var matchesToRemoveCount = 0;',
'					var currentMatchRemoved = false;',
'					var matchesToRemove = [];',
'					var i, iLen, j, jLen;',
'',
'					// Establish the list of matches to be removed',
'					for (i = 0, iLen = this.matches.length; i < iLen; i++) {',
'						for (j = 0, jLen = logEntries.length; j < jLen; j++) {',
'							if (this.matches[i].belongsTo(logEntries[j])) {',
'								matchesToRemove.push(this.matches[i]);',
'								if (i === currentMatchIndex) {',
'									currentMatchRemoved = true;',
'								}',
'							}',
'						}',
'					}',
'',
'					// Set the new current match index if the current match has been deleted',
'					// This will be the first match that appears after the first log entry being',
'					// deleted, if one exists; otherwise, it\'s the first match overall',
'					var newMatch = currentMatchRemoved ? null : this.matches[currentMatchIndex];',
'					if (currentMatchRemoved) {',
'						for (i = currentMatchIndex, iLen = this.matches.length; i < iLen; i++) {',
'							if (this.matches[i].isVisible() && !array_contains(matchesToRemove, this.matches[i])) {',
'								newMatch = this.matches[i];',
'								break;',
'							}',
'						}',
'					}',
'',
'					// Remove the matches',
'					for (i = 0, iLen = matchesToRemove.length; i < iLen; i++) {',
'						array_remove(this.matches, matchesToRemove[i]);',
'						matchesToRemove[i].remove();',
'					}',
'',
'					// Set the new match, if one exists',
'					if (this.hasVisibleMatches()) {',
'						if (newMatch === null) {',
'							setCurrentMatchIndex(0);',
'						} else {',
'							// Get the index of the new match',
'							var newMatchIndex = 0;',
'							for (i = 0, iLen = this.matches.length; i < iLen; i++) {',
'								if (newMatch === this.matches[i]) {',
'									newMatchIndex = i;',
'									break;',
'								}',
'							}',
'							setCurrentMatchIndex(newMatchIndex);',
'						}',
'					} else {',
'						currentMatchIndex = null;',
'						displayNoMatches();',
'					}',
'				}',
'			};',
'',
'			function getPageOffsetTop(el, container) {',
'				var currentEl = el;',
'				var y = 0;',
'				while (currentEl && currentEl != container) {',
'					y += currentEl.offsetTop;',
'					currentEl = currentEl.offsetParent;',
'				}',
'				return y;',
'			}',
'',
'			function scrollIntoView(el) {',
'				var logContainer = logMainContainer;',
'				// Check if the whole width of the element is visible and centre if not',
'				if (!$("wrap").checked) {',
'					var logContainerLeft = logContainer.scrollLeft;',
'					var logContainerRight = logContainerLeft  + logContainer.offsetWidth;',
'					var elLeft = el.offsetLeft;',
'					var elRight = elLeft + el.offsetWidth;',
'					if (elLeft < logContainerLeft || elRight > logContainerRight) {',
'						logContainer.scrollLeft = elLeft - (logContainer.offsetWidth - el.offsetWidth) / 2;',
'					}',
'				}',
'				// Check if the whole height of the element is visible and centre if not',
'				var logContainerTop = logContainer.scrollTop;',
'				var logContainerBottom = logContainerTop  + logContainer.offsetHeight;',
'				var elTop = getPageOffsetTop(el) - getToolBarsHeight();',
'				var elBottom = elTop + el.offsetHeight;',
'				if (elTop < logContainerTop || elBottom > logContainerBottom) {',
'					logContainer.scrollTop = elTop - (logContainer.offsetHeight - el.offsetHeight) / 2;',
'				}',
'			}',
'',
'			function Match(logEntryLevel, spanInMainDiv, spanInUnwrappedPre, spanInWrappedDiv) {',
'				this.logEntryLevel = logEntryLevel;',
'				this.spanInMainDiv = spanInMainDiv;',
'				if (isIe) {',
'					this.spanInUnwrappedPre = spanInUnwrappedPre;',
'					this.spanInWrappedDiv = spanInWrappedDiv;',
'				}',
'				this.mainSpan = isIe ? spanInUnwrappedPre : spanInMainDiv;',
'			}',
'',
'			Match.prototype = {',
'				equals: function(match) {',
'					return this.mainSpan === match.mainSpan;',
'				},',
'',
'				setCurrent: function() {',
'					if (isIe) {',
'						addClass(this.spanInUnwrappedPre, "currentmatch");',
'						addClass(this.spanInWrappedDiv, "currentmatch");',
'						// Scroll the visible one into view',
'						var elementToScroll = $("wrap").checked ? this.spanInWrappedDiv : this.spanInUnwrappedPre;',
'						scrollIntoView(elementToScroll);',
'					} else {',
'						addClass(this.spanInMainDiv, "currentmatch");',
'						scrollIntoView(this.spanInMainDiv);',
'					}',
'				},',
'',
'				belongsTo: function(logEntry) {',
'					if (isIe) {',
'						return isDescendant(this.spanInUnwrappedPre, logEntry.unwrappedPre);',
'					} else {',
'						return isDescendant(this.spanInMainDiv, logEntry.mainDiv);',
'					}',
'				},',
'',
'				setNotCurrent: function() {',
'					if (isIe) {',
'						removeClass(this.spanInUnwrappedPre, "currentmatch");',
'						removeClass(this.spanInWrappedDiv, "currentmatch");',
'					} else {',
'						removeClass(this.spanInMainDiv, "currentmatch");',
'					}',
'				},',
'',
'				isOrphan: function() {',
'					return isOrphan(this.mainSpan);',
'				},',
'',
'				isVisible: function() {',
'					return getCheckBox(this.logEntryLevel).checked;',
'				},',
'',
'				remove: function() {',
'					if (isIe) {',
'						this.spanInUnwrappedPre = null;',
'						this.spanInWrappedDiv = null;',
'					} else {',
'						this.spanInMainDiv = null;',
'					}',
'				}',
'			};',
'',
'			var currentSearch = null;',
'			var currentMatchIndex = null;',
'',
'			function doSearch() {',
'				var searchBox = $("searchBox");',
'				var searchTerm = searchBox.value;',
'				var isRegex = $("searchRegex").checked;',
'				var isCaseSensitive = $("searchCaseSensitive").checked;',
'				var i;',
'',
'				if (searchTerm === "") {',
'					$("searchReset").disabled = true;',
'					$("searchNav").style.display = "none";',
'					removeClass(document.body, "searching");',
'					removeClass(searchBox, "hasmatches");',
'					removeClass(searchBox, "nomatches");',
'					for (i = 0; i < logEntries.length; i++) {',
'						logEntries[i].clearSearch();',
'						logEntries[i].setContent(logEntries[i].formattedMessage, logEntries[i].formattedMessage);',
'					}',
'					currentSearch = null;',
'					setLogContainerHeight();',
'				} else {',
'					$("searchReset").disabled = false;',
'					$("searchNav").style.display = "block";',
'					var searchRegex;',
'					var regexValid;',
'					if (isRegex) {',
'						try {',
'							searchRegex = isCaseSensitive ? new RegExp(searchTerm, "g") : new RegExp(searchTerm, "gi");',
'							regexValid = true;',
'							replaceClass(searchBox, "validregex", "invalidregex");',
'							searchBox.title = "Valid regex";',
'						} catch (ex) {',
'							regexValid = false;',
'							replaceClass(searchBox, "invalidregex", "validregex");',
'							searchBox.title = "Invalid regex: " + (ex.message ? ex.message : (ex.description ? ex.description : "unknown error"));',
'							return;',
'						}',
'					} else {',
'						searchBox.title = "";',
'						removeClass(searchBox, "validregex");',
'						removeClass(searchBox, "invalidregex");',
'					}',
'					addClass(document.body, "searching");',
'					currentSearch = new Search(searchTerm, isRegex, searchRegex, isCaseSensitive);',
'					for (i = 0; i < logEntries.length; i++) {',
'						currentSearch.applyTo(logEntries[i]);',
'					}',
'					setLogContainerHeight();',
'',
'					// Highlight the first search match',
'					if (currentSearch.hasVisibleMatches()) {',
'						setCurrentMatchIndex(0);',
'						displayMatches();',
'					} else {',
'						displayNoMatches();',
'					}',
'				}',
'			}',
'',
'			function updateSearchFromFilters() {',
'				if (currentSearch) {',
'					if (currentSearch.hasMatches()) {',
'						if (currentMatchIndex === null) {',
'							currentMatchIndex = 0;',
'						}',
'						var currentMatch = currentSearch.matches[currentMatchIndex];',
'						if (currentMatch.isVisible()) {',
'							displayMatches();',
'							setCurrentMatchIndex(currentMatchIndex);',
'						} else {',
'							currentMatch.setNotCurrent();',
'							// Find the next visible match, if one exists',
'							var nextVisibleMatchIndex = currentSearch.getNextVisibleMatchIndex();',
'							if (nextVisibleMatchIndex > -1) {',
'								setCurrentMatchIndex(nextVisibleMatchIndex);',
'								displayMatches();',
'							} else {',
'								displayNoMatches();',
'							}',
'						}',
'					} else {',
'						displayNoMatches();',
'					}',
'				}',
'			}',
'',
'			function refreshCurrentMatch() {',
'				if (currentSearch && currentSearch.hasVisibleMatches()) {',
'					setCurrentMatchIndex(currentMatchIndex);',
'				}',
'			}',
'',
'			function displayMatches() {',
'				replaceClass($("searchBox"), "hasmatches", "nomatches");',
'				$("searchBox").title = "" + currentSearch.matches.length + " matches found";',
'				$("searchNav").style.display = "block";',
'				setLogContainerHeight();',
'			}',
'',
'			function displayNoMatches() {',
'				replaceClass($("searchBox"), "nomatches", "hasmatches");',
'				$("searchBox").title = "No matches found";',
'				$("searchNav").style.display = "none";',
'				setLogContainerHeight();',
'			}',
'',
'			function toggleSearchEnabled(enable) {',
'				enable = (typeof enable == "undefined") ? !$("searchDisable").checked : enable;',
'				$("searchBox").disabled = !enable;',
'				$("searchReset").disabled = !enable;',
'				$("searchRegex").disabled = !enable;',
'				$("searchNext").disabled = !enable;',
'				$("searchPrevious").disabled = !enable;',
'				$("searchCaseSensitive").disabled = !enable;',
'				$("searchNav").style.display = (enable && ($("searchBox").value !== "") &&',
'						currentSearch && currentSearch.hasVisibleMatches()) ?',
'					"block" : "none";',
'				if (enable) {',
'					removeClass($("search"), "greyedout");',
'					addClass(document.body, "searching");',
'					if ($("searchHighlight").checked) {',
'						addClass(logMainContainer, "searchhighlight");',
'					} else {',
'						removeClass(logMainContainer, "searchhighlight");',
'					}',
'					if ($("searchFilter").checked) {',
'						addClass(logMainContainer, "searchfilter");',
'					} else {',
'						removeClass(logMainContainer, "searchfilter");',
'					}',
'					$("searchDisable").checked = !enable;',
'				} else {',
'					addClass($("search"), "greyedout");',
'					removeClass(document.body, "searching");',
'					removeClass(logMainContainer, "searchhighlight");',
'					removeClass(logMainContainer, "searchfilter");',
'				}',
'				setLogContainerHeight();',
'			}',
'',
'			function toggleSearchFilter() {',
'				var enable = $("searchFilter").checked;',
'				if (enable) {',
'					addClass(logMainContainer, "searchfilter");',
'				} else {',
'					removeClass(logMainContainer, "searchfilter");',
'				}',
'				refreshCurrentMatch();',
'			}',
'',
'			function toggleSearchHighlight() {',
'				var enable = $("searchHighlight").checked;',
'				if (enable) {',
'					addClass(logMainContainer, "searchhighlight");',
'				} else {',
'					removeClass(logMainContainer, "searchhighlight");',
'				}',
'			}',
'',
'			function clearSearch() {',
'				$("searchBox").value = "";',
'				doSearch();',
'			}',
'',
'			function searchNext() {',
'				if (currentSearch !== null && currentMatchIndex !== null) {',
'					currentSearch.matches[currentMatchIndex].setNotCurrent();',
'					var nextMatchIndex = currentSearch.getNextVisibleMatchIndex();',
'					if (nextMatchIndex > currentMatchIndex || confirm("Reached the end of the page. Start from the top?")) {',
'						setCurrentMatchIndex(nextMatchIndex);',
'					}',
'				}',
'			}',
'',
'			function searchPrevious() {',
'				if (currentSearch !== null && currentMatchIndex !== null) {',
'					currentSearch.matches[currentMatchIndex].setNotCurrent();',
'					var previousMatchIndex = currentSearch.getPreviousVisibleMatchIndex();',
'					if (previousMatchIndex < currentMatchIndex || confirm("Reached the start of the page. Continue from the bottom?")) {',
'						setCurrentMatchIndex(previousMatchIndex);',
'					}',
'				}',
'			}',
'',
'			function setCurrentMatchIndex(index) {',
'				currentMatchIndex = index;',
'				currentSearch.matches[currentMatchIndex].setCurrent();',
'			}',
'',
'			/* ------------------------------------------------------------------------- */',
'',
'			// CSS Utilities',
'',
'			function addClass(el, cssClass) {',
'				if (!hasClass(el, cssClass)) {',
'					if (el.className) {',
'						el.className += " " + cssClass;',
'					} else {',
'						el.className = cssClass;',
'					}',
'				}',
'			}',
'',
'			function hasClass(el, cssClass) {',
'				if (el.className) {',
'					var classNames = el.className.split(" ");',
'					return array_contains(classNames, cssClass);',
'				}',
'				return false;',
'			}',
'',
'			function removeClass(el, cssClass) {',
'				if (hasClass(el, cssClass)) {',
'					// Rebuild the className property',
'					var existingClasses = el.className.split(" ");',
'					var newClasses = [];',
'					for (var i = 0, len = existingClasses.length; i < len; i++) {',
'						if (existingClasses[i] != cssClass) {',
'							newClasses[newClasses.length] = existingClasses[i];',
'						}',
'					}',
'					el.className = newClasses.join(" ");',
'				}',
'			}',
'',
'			function replaceClass(el, newCssClass, oldCssClass) {',
'				removeClass(el, oldCssClass);',
'				addClass(el, newCssClass);',
'			}',
'',
'			/* ------------------------------------------------------------------------- */',
'',
'			// Other utility functions',
'',
'			function getElementsByClass(el, cssClass, tagName) {',
'				var elements = el.getElementsByTagName(tagName);',
'				var matches = [];',
'				for (var i = 0, len = elements.length; i < len; i++) {',
'					if (hasClass(elements[i], cssClass)) {',
'						matches.push(elements[i]);',
'					}',
'				}',
'				return matches;',
'			}',
'',
'			// Syntax borrowed from Prototype library',
'			function $(id) {',
'				return document.getElementById(id);',
'			}',
'',
'			function isDescendant(node, ancestorNode) {',
'				while (node != null) {',
'					if (node === ancestorNode) {',
'						return true;',
'					}',
'					node = node.parentNode;',
'				}',
'				return false;',
'			}',
'',
'			function isOrphan(node) {',
'				var currentNode = node;',
'				while (currentNode) {',
'					if (currentNode == document.body) {',
'						return false;',
'					}',
'					currentNode = currentNode.parentNode;',
'				}',
'				return true;',
'			}',
'',
'			function escapeHtml(str) {',
'				return str.replace(/&/g, "&amp;").replace(/[<]/g, "&lt;").replace(/>/g, "&gt;");',
'			}',
'',
'			function getWindowWidth() {',
'				if (window.innerWidth) {',
'					return window.innerWidth;',
'				} else if (document.documentElement && document.documentElement.clientWidth) {',
'					return document.documentElement.clientWidth;',
'				} else if (document.body) {',
'					return document.body.clientWidth;',
'				}',
'				return 0;',
'			}',
'',
'			function getWindowHeight() {',
'				if (window.innerHeight) {',
'					return window.innerHeight;',
'				} else if (document.documentElement && document.documentElement.clientHeight) {',
'					return document.documentElement.clientHeight;',
'				} else if (document.body) {',
'					return document.body.clientHeight;',
'				}',
'				return 0;',
'			}',
'',
'			function getToolBarsHeight() {',
'				return $("switches").offsetHeight;',
'			}',
'',
'			function getChromeHeight() {',
'				var height = getToolBarsHeight();',
'				if (showCommandLine) {',
'					height += $("commandLine").offsetHeight;',
'				}',
'				return height;',
'			}',
'',
'			function setLogContainerHeight() {',
'				if (logMainContainer) {',
'					var windowHeight = getWindowHeight();',
'					$("body").style.height = getWindowHeight() + "px";',
'					logMainContainer.style.height = "" +',
'						Math.max(0, windowHeight - getChromeHeight()) + "px";',
'				}',
'			}',
'',
'			function setCommandInputWidth() {',
'				if (showCommandLine) {',
'					$("command").style.width = "" + Math.max(0, $("commandLineContainer").offsetWidth -',
'						($("evaluateButton").offsetWidth + 13)) + "px";',
'				}',
'			}',
'',
'			window.onresize = function() {',
'				setCommandInputWidth();',
'				setLogContainerHeight();',
'			};',
'',
'			if (!Array.prototype.push) {',
'				Array.prototype.push = function() {',
'			        for (var i = 0, len = arguments.length; i < len; i++){',
'			            this[this.length] = arguments[i];',
'			        }',
'			        return this.length;',
'				};',
'			}',
'',
'			if (!Array.prototype.pop) {',
'				Array.prototype.pop = function() {',
'					if (this.length > 0) {',
'						var val = this[this.length - 1];',
'						this.length = this.length - 1;',
'						return val;',
'					}',
'				};',
'			}',
'',
'			if (!Array.prototype.shift) {',
'				Array.prototype.shift = function() {',
'					if (this.length > 0) {',
'						var firstItem = this[0];',
'						for (var i = 0, len = this.length - 1; i < len; i++) {',
'							this[i] = this[i + 1];',
'						}',
'						this.length = this.length - 1;',
'						return firstItem;',
'					}',
'				};',
'			}',
'',
'			if (!Array.prototype.splice) {',
'				Array.prototype.splice = function(startIndex, deleteCount) {',
'					var itemsAfterDeleted = this.slice(startIndex + deleteCount);',
'					var itemsDeleted = this.slice(startIndex, startIndex + deleteCount);',
'					this.length = startIndex;',
'					// Copy the arguments into a proper Array object',
'					var argumentsArray = [];',
'					for (var i = 0, len = arguments.length; i < len; i++) {',
'						argumentsArray[i] = arguments[i];',
'					}',
'					var itemsToAppend = (argumentsArray.length > 2) ?',
'						itemsAfterDeleted = argumentsArray.slice(2).concat(itemsAfterDeleted) : itemsAfterDeleted;',
'					for (i = 0, len = itemsToAppend.length; i < len; i++) {',
'						this.push(itemsToAppend[i]);',
'					}',
'					return itemsDeleted;',
'				};',
'			}',
'',
'			function array_remove(arr, val) {',
'				var index = -1;',
'				for (var i = 0, len = arr.length; i < len; i++) {',
'					if (arr[i] === val) {',
'						index = i;',
'						break;',
'					}',
'				}',
'				if (index >= 0) {',
'					arr.splice(index, 1);',
'					return index;',
'				} else {',
'					return false;',
'				}',
'			}',
'',
'			function array_removeFromStart(array, numberToRemove) {',
'				if (Array.prototype.splice) {',
'					array.splice(0, numberToRemove);',
'				} else {',
'					for (var i = numberToRemove, len = array.length; i < len; i++) {',
'						array[i - numberToRemove] = array[i];',
'					}',
'					array.length = array.length - numberToRemove;',
'				}',
'				return array;',
'			}',
'',
'			function array_contains(arr, val) {',
'				for (var i = 0, len = arr.length; i < len; i++) {',
'					if (arr[i] == val) {',
'						return true;',
'					}',
'				}',
'				return false;',
'			}',
'',
'			function getErrorMessage(ex) {',
'				if (ex.message) {',
'					return ex.message;',
'				} else if (ex.description) {',
'					return ex.description;',
'				}',
'				return "" + ex;',
'			}',
'',
'			function moveCaretToEnd(input) {',
'				if (input.setSelectionRange) {',
'					input.focus();',
'					var length = input.value.length;',
'					input.setSelectionRange(length, length);',
'				} else if (input.createTextRange) {',
'					var range = input.createTextRange();',
'					range.collapse(false);',
'					range.select();',
'				}',
'				input.focus();',
'			}',
'',
'			function stopPropagation(evt) {',
'				if (evt.stopPropagation) {',
'					evt.stopPropagation();',
'				} else if (typeof evt.cancelBubble != "undefined") {',
'					evt.cancelBubble = true;',
'				}',
'			}',
'',
'			function getEvent(evt) {',
'				return evt ? evt : event;',
'			}',
'',
'			function getTarget(evt) {',
'				return evt.target ? evt.target : evt.srcElement;',
'			}',
'',
'			function getRelatedTarget(evt) {',
'				if (evt.relatedTarget) {',
'					return evt.relatedTarget;',
'				} else if (evt.srcElement) {',
'					switch(evt.type) {',
'						case "mouseover":',
'							return evt.fromElement;',
'						case "mouseout":',
'							return evt.toElement;',
'						default:',
'							return evt.srcElement;',
'					}',
'				}',
'			}',
'',
'			function cancelKeyEvent(evt) {',
'				evt.returnValue = false;',
'				stopPropagation(evt);',
'			}',
'',
'			function evalCommandLine() {',
'				var expr = $("command").value;',
'				evalCommand(expr);',
'				$("command").value = "";',
'			}',
'',
'			function evalLastCommand() {',
'				if (lastCommand != null) {',
'					evalCommand(lastCommand);',
'				}',
'			}',
'',
'			var lastCommand = null;',
'			var commandHistory = [];',
'			var currentCommandIndex = 0;',
'',
'			function evalCommand(expr) {',
'				if (appender) {',
'					appender.evalCommandAndAppend(expr);',
'				} else {',
'					var prefix = ">>> " + expr + "\\r\\n";',
'					try {',
'						log("INFO", prefix + eval(expr));',
'					} catch (ex) {',
'						log("ERROR", prefix + "Error: " + getErrorMessage(ex));',
'					}',
'				}',
'				// Update command history',
'				if (expr != commandHistory[commandHistory.length - 1]) {',
'					commandHistory.push(expr);',
'					// Update the appender',
'					if (appender) {',
'						appender.storeCommandHistory(commandHistory);',
'					}',
'				}',
'				currentCommandIndex = (expr == commandHistory[currentCommandIndex]) ? currentCommandIndex + 1 : commandHistory.length;',
'				lastCommand = expr;',
'			}',
'			//]]>',
'		</script>',
'		<style type="text/css">',
'			body {',
'				background-color: white;',
'				color: black;',
'				padding: 0;',
'				margin: 0;',
'				font-family: tahoma, verdana, arial, helvetica, sans-serif;',
'				overflow: hidden;',
'			}',
'',
'			div#switchesContainer input {',
'				margin-bottom: 0;',
'			}',
'',
'			div.toolbar {',
'				border-top: solid #ffffff 1px;',
'				border-bottom: solid #aca899 1px;',
'				background-color: #f1efe7;',
'				padding: 3px 5px;',
'				font-size: 68.75%;',
'			}',
'',
'			div.toolbar, div#search input {',
'				font-family: tahoma, verdana, arial, helvetica, sans-serif;',
'			}',
'',
'			div.toolbar input.button {',
'				padding: 0 5px;',
'				font-size: 100%;',
'			}',
'',
'			div.toolbar input.hidden {',
'				display: none;',
'			}',
'',
'			div#switches input#clearButton {',
'				margin-left: 20px;',
'			}',
'',
'			div#levels label {',
'				font-weight: bold;',
'			}',
'',
'			div#levels label, div#options label {',
'				margin-right: 5px;',
'			}',
'',
'			div#levels label#wrapLabel {',
'				font-weight: normal;',
'			}',
'',
'			div#search label {',
'				margin-right: 10px;',
'			}',
'',
'			div#search label.searchboxlabel {',
'				margin-right: 0;',
'			}',
'',
'			div#search input {',
'				font-size: 100%;',
'			}',
'',
'			div#search input.validregex {',
'				color: green;',
'			}',
'',
'			div#search input.invalidregex {',
'				color: red;',
'			}',
'',
'			div#search input.nomatches {',
'				color: white;',
'				background-color: #ff6666;',
'			}',
'',
'			div#search input.nomatches {',
'				color: white;',
'				background-color: #ff6666;',
'			}',
'',
'			div#searchNav {',
'				display: none;',
'			}',
'',
'			div#commandLine {',
'				display: none;',
'			}',
'',
'			div#commandLine input#command {',
'				font-size: 100%;',
'				font-family: Courier New, Courier;',
'			}',
'',
'			div#commandLine input#evaluateButton {',
'			}',
'',
'			*.greyedout {',
'				color: gray !important;',
'				border-color: gray !important;',
'			}',
'',
'			*.greyedout *.alwaysenabled { color: black; }',
'',
'			*.unselectable {',
'				-khtml-user-select: none;',
'				-moz-user-select: none;',
'				user-select: none;',
'			}',
'',
'			div#log {',
'				font-family: Courier New, Courier;',
'				font-size: 75%;',
'				width: 100%;',
'				overflow: auto;',
'				clear: both;',
'				position: relative;',
'			}',
'',
'			div.group {',
'				border-color: #cccccc;',
'				border-style: solid;',
'				border-width: 1px 0 1px 1px;',
'				overflow: visible;',
'			}',
'',
'			div.oldIe div.group, div.oldIe div.group *, div.oldIe *.logentry {',
'				height: 1%;',
'			}',
'',
'			div.group div.groupheading span.expander {',
'				border: solid black 1px;',
'				font-family: Courier New, Courier;',
'				font-size: 0.833em;',
'				background-color: #eeeeee;',
'				position: relative;',
'				top: -1px;',
'				color: black;',
'				padding: 0 2px;',
'				cursor: pointer;',
'				cursor: hand;',
'				height: 1%;',
'			}',
'',
'			div.group div.groupcontent {',
'				margin-left: 10px;',
'				padding-bottom: 2px;',
'				overflow: visible;',
'			}',
'',
'			div.group div.expanded {',
'				display: block;',
'			}',
'',
'			div.group div.collapsed {',
'				display: none;',
'			}',
'',
'			*.logentry {',
'				overflow: visible;',
'				display: none;',
'				white-space: pre;',
'			}',
'',
'			span.pre {',
'				white-space: pre;',
'			}',
'			',
'			pre.unwrapped {',
'				display: inline !important;',
'			}',
'',
'			pre.unwrapped pre.pre, div.wrapped pre.pre {',
'				display: inline;',
'			}',
'',
'			div.wrapped pre.pre {',
'				white-space: normal;',
'			}',
'',
'			div.wrapped {',
'				display: none;',
'			}',
'',
'			body.searching *.logentry span.currentmatch {',
'				color: white !important;',
'				background-color: green !important;',
'			}',
'',
'			body.searching div.searchhighlight *.logentry span.searchterm {',
'				color: black;',
'				background-color: yellow;',
'			}',
'',
'			div.wrap *.logentry {',
'				white-space: normal !important;',
'				border-width: 0 0 1px 0;',
'				border-color: #dddddd;',
'				border-style: dotted;',
'			}',
'',
'			div.wrap #log_wrapped, #log_unwrapped {',
'				display: block;',
'			}',
'',
'			div.wrap #log_unwrapped, #log_wrapped {',
'				display: none;',
'			}',
'',
'			div.wrap *.logentry span.pre {',
'				overflow: visible;',
'				white-space: normal;',
'			}',
'',
'			div.wrap *.logentry pre.unwrapped {',
'				display: none;',
'			}',
'',
'			div.wrap *.logentry span.wrapped {',
'				display: inline;',
'			}',
'',
'			div.searchfilter *.searchnonmatch {',
'				display: none !important;',
'			}',
'',
'			div#log *.TRACE, label#label_TRACE {',
'				color: #666666;',
'			}',
'',
'			div#log *.DEBUG, label#label_DEBUG {',
'				color: green;',
'			}',
'',
'			div#log *.INFO, label#label_INFO {',
'				color: #000099;',
'			}',
'',
'			div#log *.WARN, label#label_WARN {',
'				color: #999900;',
'			}',
'',
'			div#log *.ERROR, label#label_ERROR {',
'				color: red;',
'			}',
'',
'			div#log *.FATAL, label#label_FATAL {',
'				color: #660066;',
'			}',
'',
'			div.TRACE#log *.TRACE,',
'			div.DEBUG#log *.DEBUG,',
'			div.INFO#log *.INFO,',
'			div.WARN#log *.WARN,',
'			div.ERROR#log *.ERROR,',
'			div.FATAL#log *.FATAL {',
'				display: block;',
'			}',
'',
'			div#log div.separator {',
'				background-color: #cccccc;',
'				margin: 5px 0;',
'				line-height: 1px;',
'			}',
'		</style>',
'	</head>',
'',
'	<body id="body">',
'		<div id="switchesContainer">',
'			<div id="switches">',
'				<div id="levels" class="toolbar">',
'					Filters:',
'					<input type="checkbox" id="switch_TRACE" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide trace messages" /><label for="switch_TRACE" id="label_TRACE">trace</label>',
'					<input type="checkbox" id="switch_DEBUG" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide debug messages" /><label for="switch_DEBUG" id="label_DEBUG">debug</label>',
'					<input type="checkbox" id="switch_INFO" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide info messages" /><label for="switch_INFO" id="label_INFO">info</label>',
'					<input type="checkbox" id="switch_WARN" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide warn messages" /><label for="switch_WARN" id="label_WARN">warn</label>',
'					<input type="checkbox" id="switch_ERROR" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide error messages" /><label for="switch_ERROR" id="label_ERROR">error</label>',
'					<input type="checkbox" id="switch_FATAL" onclick="applyFilters(); checkAllLevels()" checked="checked" title="Show/hide fatal messages" /><label for="switch_FATAL" id="label_FATAL">fatal</label>',
'					<input type="checkbox" id="switch_ALL" onclick="toggleAllLevels(); applyFilters()" checked="checked" title="Show/hide all messages" /><label for="switch_ALL" id="label_ALL">all</label>',
'				</div>',
'				<div id="search" class="toolbar">',
'					<label for="searchBox" class="searchboxlabel">Search:</label> <input type="text" id="searchBox" onclick="toggleSearchEnabled(true)" onkeyup="scheduleSearch()" size="20" />',
'					<input type="button" id="searchReset" disabled="disabled" value="Reset" onclick="clearSearch()" class="button" title="Reset the search" />',
'					<input type="checkbox" id="searchRegex" onclick="doSearch()" title="If checked, search is treated as a regular expression" /><label for="searchRegex">Regex</label>',
'					<input type="checkbox" id="searchCaseSensitive" onclick="doSearch()" title="If checked, search is case sensitive" /><label for="searchCaseSensitive">Match case</label>',
'					<input type="checkbox" id="searchDisable" onclick="toggleSearchEnabled()" title="Enable/disable search" /><label for="searchDisable" class="alwaysenabled">Disable</label>',
'					<div id="searchNav">',
'						<input type="button" id="searchNext" disabled="disabled" value="Next" onclick="searchNext()" class="button" title="Go to the next matching log entry" />',
'						<input type="button" id="searchPrevious" disabled="disabled" value="Previous" onclick="searchPrevious()" class="button" title="Go to the previous matching log entry" />',
'						<input type="checkbox" id="searchFilter" onclick="toggleSearchFilter()" title="If checked, non-matching log entries are filtered out" /><label for="searchFilter">Filter</label>',
'						<input type="checkbox" id="searchHighlight" onclick="toggleSearchHighlight()" title="Highlight matched search terms" /><label for="searchHighlight" class="alwaysenabled">Highlight all</label>',
'					</div>',
'				</div>',
'				<div id="options" class="toolbar">',
'					Options:',
'					<input type="checkbox" id="enableLogging" onclick="toggleLoggingEnabled()" checked="checked" title="Enable/disable logging" /><label for="enableLogging" id="enableLoggingLabel">Log</label>',
'					<input type="checkbox" id="wrap" onclick="toggleWrap()" title="Enable / disable word wrap" /><label for="wrap" id="wrapLabel">Wrap</label>',
'					<input type="checkbox" id="newestAtTop" onclick="toggleNewestAtTop()" title="If checked, causes newest messages to appear at the top" /><label for="newestAtTop" id="newestAtTopLabel">Newest at the top</label>',
'					<input type="checkbox" id="scrollToLatest" onclick="toggleScrollToLatest()" checked="checked" title="If checked, window automatically scrolls to a new message when it is added" /><label for="scrollToLatest" id="scrollToLatestLabel">Scroll to latest</label>',
'					<input type="button" id="clearButton" value="Clear" onclick="clearLog()" class="button" title="Clear all log messages"  />',
'					<input type="button" id="hideButton" value="Hide" onclick="hide()" class="hidden button" title="Hide the console" />',
'					<input type="button" id="closeButton" value="Close" onclick="closeWindow()" class="hidden button" title="Close the window" />',
'				</div>',
'			</div>',
'		</div>',
'		<div id="log" class="TRACE DEBUG INFO WARN ERROR FATAL"></div>',
'		<div id="commandLine" class="toolbar">',
'			<div id="commandLineContainer">',
'				<input type="text" id="command" title="Enter a JavaScript command here and hit return or press \'Evaluate\'" />',
'				<input type="button" id="evaluateButton" value="Evaluate" class="button" title="Evaluate the command" onclick="evalCommandLine()" />',
'			</div>',
'		</div>',
'	</body>',
'</html>',
''
];
		};

		var defaultCommandLineFunctions = [];

		ConsoleAppender = function() {};

		var consoleAppenderIdCounter = 1;
		ConsoleAppender.prototype = new Appender();

		ConsoleAppender.prototype.create = function(inPage, container,
				lazyInit, initiallyMinimized, useDocumentWrite, width, height, focusConsoleWindow) {
			var appender = this;

			// Common properties
			var initialized = false;
			var consoleWindowCreated = false;
			var consoleWindowLoaded = false;
			var consoleClosed = false;

			var queuedLoggingEvents = [];
			var isSupported = true;
			var consoleAppenderId = consoleAppenderIdCounter++;

			// Local variables
			initiallyMinimized = extractBooleanFromParam(initiallyMinimized, this.defaults.initiallyMinimized);
			lazyInit = extractBooleanFromParam(lazyInit, this.defaults.lazyInit);
			useDocumentWrite = extractBooleanFromParam(useDocumentWrite, this.defaults.useDocumentWrite);
			var newestMessageAtTop = this.defaults.newestMessageAtTop;
			var scrollToLatestMessage = this.defaults.scrollToLatestMessage;
			width = width ? width : this.defaults.width;
			height = height ? height : this.defaults.height;
			var maxMessages = this.defaults.maxMessages;
			var showCommandLine = this.defaults.showCommandLine;
			var commandLineObjectExpansionDepth = this.defaults.commandLineObjectExpansionDepth;
			var showHideButton = this.defaults.showHideButton;
			var showCloseButton = this.defaults.showCloseButton;

			this.setLayout(this.defaults.layout);

			// Functions whose implementations vary between subclasses
			var init, createWindow, safeToAppend, getConsoleWindow, open;

			// Configuration methods. The function scope is used to prevent
			// direct alteration to the appender configuration properties.
			var appenderName = inPage ? "InPageAppender" : "PopUpAppender";
			var checkCanConfigure = function(configOptionName) {
				if (consoleWindowCreated) {
					handleError(appenderName + ": configuration option '" + configOptionName + "' may not be set after the appender has been initialized");
					return false;
				}
				return true;
			};

			var consoleWindowExists = function() {
				return (consoleWindowLoaded && isSupported && !consoleClosed);
			};

			this.isNewestMessageAtTop = function() { return newestMessageAtTop; };
			this.setNewestMessageAtTop = function(newestMessageAtTopParam) {
				newestMessageAtTop = bool(newestMessageAtTopParam);
				if (consoleWindowExists()) {
					getConsoleWindow().setNewestAtTop(newestMessageAtTop);
				}
			};

			this.isScrollToLatestMessage = function() { return scrollToLatestMessage; };
			this.setScrollToLatestMessage = function(scrollToLatestMessageParam) {
				scrollToLatestMessage = bool(scrollToLatestMessageParam);
				if (consoleWindowExists()) {
					getConsoleWindow().setScrollToLatest(scrollToLatestMessage);
				}
			};

			this.getWidth = function() { return width; };
			this.setWidth = function(widthParam) {
				if (checkCanConfigure("width")) {
					width = extractStringFromParam(widthParam, width);
				}
			};

			this.getHeight = function() { return height; };
			this.setHeight = function(heightParam) {
				if (checkCanConfigure("height")) {
					height = extractStringFromParam(heightParam, height);
				}
			};

			this.getMaxMessages = function() { return maxMessages; };
			this.setMaxMessages = function(maxMessagesParam) {
				maxMessages = extractIntFromParam(maxMessagesParam, maxMessages);
				if (consoleWindowExists()) {
					getConsoleWindow().setMaxMessages(maxMessages);
				}
			};

			this.isShowCommandLine = function() { return showCommandLine; };
			this.setShowCommandLine = function(showCommandLineParam) {
				showCommandLine = bool(showCommandLineParam);
				if (consoleWindowExists()) {
					getConsoleWindow().setShowCommandLine(showCommandLine);
				}
			};

			this.isShowHideButton = function() { return showHideButton; };
			this.setShowHideButton = function(showHideButtonParam) {
				showHideButton = bool(showHideButtonParam);
				if (consoleWindowExists()) {
					getConsoleWindow().setShowHideButton(showHideButton);
				}
			};

			this.isShowCloseButton = function() { return showCloseButton; };
			this.setShowCloseButton = function(showCloseButtonParam) {
				showCloseButton = bool(showCloseButtonParam);
				if (consoleWindowExists()) {
					getConsoleWindow().setShowCloseButton(showCloseButton);
				}
			};

			this.getCommandLineObjectExpansionDepth = function() { return commandLineObjectExpansionDepth; };
			this.setCommandLineObjectExpansionDepth = function(commandLineObjectExpansionDepthParam) {
				commandLineObjectExpansionDepth = extractIntFromParam(commandLineObjectExpansionDepthParam, commandLineObjectExpansionDepth);
			};

			var minimized = initiallyMinimized;
			this.isInitiallyMinimized = function() { return initiallyMinimized; };
			this.setInitiallyMinimized = function(initiallyMinimizedParam) {
				if (checkCanConfigure("initiallyMinimized")) {
					initiallyMinimized = bool(initiallyMinimizedParam);
					minimized = initiallyMinimized;
				}
			};

			this.isUseDocumentWrite = function() { return useDocumentWrite; };
			this.setUseDocumentWrite = function(useDocumentWriteParam) {
				if (checkCanConfigure("useDocumentWrite")) {
					useDocumentWrite = bool(useDocumentWriteParam);
				}
			};

			// Common methods
			function QueuedLoggingEvent(loggingEvent, formattedMessage) {
				this.loggingEvent = loggingEvent;
				this.levelName = loggingEvent.level.name;
				this.formattedMessage = formattedMessage;
			}

			QueuedLoggingEvent.prototype.append = function() {
				getConsoleWindow().log(this.levelName, this.formattedMessage);
			};

			function QueuedGroup(name, initiallyExpanded) {
				this.name = name;
				this.initiallyExpanded = initiallyExpanded;
			}

			QueuedGroup.prototype.append = function() {
				getConsoleWindow().group(this.name, this.initiallyExpanded);
			};

			function QueuedGroupEnd() {}

			QueuedGroupEnd.prototype.append = function() {
				getConsoleWindow().groupEnd();
			};

			var checkAndAppend = function() {
				// Next line forces a check of whether the window has been closed
				safeToAppend();
				if (!initialized) {
					init();
				} else if (consoleClosed && reopenWhenClosed) {
					createWindow();
				}
				if (safeToAppend()) {
					appendQueuedLoggingEvents();
				}
			};

			this.append = function(loggingEvent) {
				if (isSupported) {
					// Format the message
					var formattedMessage = appender.getLayout().formatWithException(loggingEvent);
					queuedLoggingEvents.push(new QueuedLoggingEvent(loggingEvent, formattedMessage));
					checkAndAppend();
				}
			};

			this.group = function(name, initiallyExpanded) {
				if (isSupported) {
					queuedLoggingEvents.push(new QueuedGroup(name, initiallyExpanded));
					checkAndAppend();
				}
			};

			this.groupEnd = function() {
				if (isSupported) {
					queuedLoggingEvents.push(new QueuedGroupEnd());
					checkAndAppend();
				}
			};

			var appendQueuedLoggingEvents = function() {
				while (queuedLoggingEvents.length > 0) {
					queuedLoggingEvents.shift().append();
				}
				if (focusConsoleWindow) {
					getConsoleWindow().focus();
				}
			};

			this.setAddedToLogger = function(logger) {
				this.loggers.push(logger);
				if (enabled && !lazyInit) {
					init();
				}
			};

			this.clear = function() {
				if (consoleWindowExists()) {
					getConsoleWindow().clearLog();
				}
				queuedLoggingEvents.length = 0;
			};

			this.focus = function() {
				if (consoleWindowExists()) {
					getConsoleWindow().focus();
				}
			};

			this.focusCommandLine = function() {
				if (consoleWindowExists()) {
					getConsoleWindow().focusCommandLine();
				}
			};

			this.focusSearch = function() {
				if (consoleWindowExists()) {
					getConsoleWindow().focusSearch();
				}
			};

			var commandWindow = window;

			this.getCommandWindow = function() { return commandWindow; };
			this.setCommandWindow = function(commandWindowParam) {
				commandWindow = commandWindowParam;
			};

			this.executeLastCommand = function() {
				if (consoleWindowExists()) {
					getConsoleWindow().evalLastCommand();
				}
			};

			var commandLayout = new PatternLayout("%m");
			this.getCommandLayout = function() { return commandLayout; };
			this.setCommandLayout = function(commandLayoutParam) {
				commandLayout = commandLayoutParam;
			};

			this.evalCommandAndAppend = function(expr) {
				var commandReturnValue = { appendResult: true, isError: false };
				var commandOutput = "";
				// Evaluate the command
				try {
					var result, i;
					// The next three lines constitute a workaround for IE. Bizarrely, iframes seem to have no
					// eval method on the window object initially, but once execScript has been called on
					// it once then the eval method magically appears. See http://www.thismuchiknow.co.uk/?p=25
					if (!commandWindow.eval && commandWindow.execScript) {
						commandWindow.execScript("null");
					}

					var commandLineFunctionsHash = {};
					for (i = 0, len = commandLineFunctions.length; i < len; i++) {
						commandLineFunctionsHash[commandLineFunctions[i][0]] = commandLineFunctions[i][1];
					}

					// Keep an array of variables that are being changed in the command window so that they
					// can be restored to their original values afterwards
					var objectsToRestore = [];
					var addObjectToRestore = function(name) {
						objectsToRestore.push([name, commandWindow[name]]);
					};

					addObjectToRestore("appender");
					commandWindow.appender = appender;

					addObjectToRestore("commandReturnValue");
					commandWindow.commandReturnValue = commandReturnValue;

					addObjectToRestore("commandLineFunctionsHash");
					commandWindow.commandLineFunctionsHash = commandLineFunctionsHash;

					var addFunctionToWindow = function(name) {
						addObjectToRestore(name);
						commandWindow[name] = function() {
							return this.commandLineFunctionsHash[name](appender, arguments, commandReturnValue);
						};
					};

					for (i = 0, len = commandLineFunctions.length; i < len; i++) {
						addFunctionToWindow(commandLineFunctions[i][0]);
					}

					// Another bizarre workaround to get IE to eval in the global scope
					if (commandWindow === window && commandWindow.execScript) {
						addObjectToRestore("evalExpr");
						addObjectToRestore("result");
						window.evalExpr = expr;
						commandWindow.execScript("window.result=eval(window.evalExpr);");
						result = window.result;
					} else {
						result = commandWindow.eval(expr);
					}
					commandOutput = isUndefined(result) ? result : formatObjectExpansion(result, commandLineObjectExpansionDepth);

					// Restore variables in the command window to their original state
					for (i = 0, len = objectsToRestore.length; i < len; i++) {
						commandWindow[objectsToRestore[i][0]] = objectsToRestore[i][1];
					}
				} catch (ex) {
					commandOutput = "Error evaluating command: " + getExceptionStringRep(ex);
					commandReturnValue.isError = true;
				}
				// Append command output
				if (commandReturnValue.appendResult) {
					var message = ">>> " + expr;
					if (!isUndefined(commandOutput)) {
						message += newLine + commandOutput;
					}
					var level = commandReturnValue.isError ? Level.ERROR : Level.INFO;
					var loggingEvent = new LoggingEvent(null, new Date(), level, [message], null);
					var mainLayout = this.getLayout();
					this.setLayout(commandLayout);
					this.append(loggingEvent);
					this.setLayout(mainLayout);
				}
			};

			var commandLineFunctions = defaultCommandLineFunctions.concat([]);

			this.addCommandLineFunction = function(functionName, commandLineFunction) {
				commandLineFunctions.push([functionName, commandLineFunction]);
			};

			var commandHistoryCookieName = "log4javascriptCommandHistory";
			this.storeCommandHistory = function(commandHistory) {
				setCookie(commandHistoryCookieName, commandHistory.join(","));
			};

			var writeHtml = function(doc) {
				var lines = getConsoleHtmlLines();
				doc.open();
				for (var i = 0, len = lines.length; i < len; i++) {
					doc.writeln(lines[i]);
				}
				doc.close();
			};

			// Set up event listeners
			this.setEventTypes(["load", "unload"]);

			var consoleWindowLoadHandler = function() {
				var win = getConsoleWindow();
				win.setAppender(appender);
				win.setNewestAtTop(newestMessageAtTop);
				win.setScrollToLatest(scrollToLatestMessage);
				win.setMaxMessages(maxMessages);
				win.setShowCommandLine(showCommandLine);
				win.setShowHideButton(showHideButton);
				win.setShowCloseButton(showCloseButton);
				win.setMainWindow(window);

				// Restore command history stored in cookie
				var storedValue = getCookie(commandHistoryCookieName);
				if (storedValue) {
					win.commandHistory = storedValue.split(",");
					win.currentCommandIndex = win.commandHistory.length;
				}

				appender.dispatchEvent("load", { "win" : win });
			};

			this.unload = function() {
				logLog.debug("unload " + this + ", caller: " + this.unload.caller);
				if (!consoleClosed) {
					logLog.debug("really doing unload " + this);
					consoleClosed = true;
					consoleWindowLoaded = false;
					consoleWindowCreated = false;
					appender.dispatchEvent("unload", {});
				}
			};

			var pollConsoleWindow = function(windowTest, interval, successCallback, errorMessage) {
				function doPoll() {
					try {
						// Test if the console has been closed while polling
						if (consoleClosed) {
							clearInterval(poll);
						}
						if (windowTest(getConsoleWindow())) {
							clearInterval(poll);
							successCallback();
						}
					} catch (ex) {
						clearInterval(poll);
						isSupported = false;
						handleError(errorMessage, ex);
					}
				}

				// Poll the pop-up since the onload event is not reliable
				var poll = setInterval(doPoll, interval);
			};

			var getConsoleUrl = function() {
				var documentDomainSet = (document.domain != location.hostname);
				return useDocumentWrite ? "" : getBaseUrl() + "console_uncompressed.html" +
											   (documentDomainSet ? "?log4javascript_domain=" + escape(document.domain) : "");
			};

			// Define methods and properties that vary between subclasses
			if (inPage) {
				// InPageAppender

				var containerElement = null;

				// Configuration methods. The function scope is used to prevent
				// direct alteration to the appender configuration properties.
				var cssProperties = [];
				this.addCssProperty = function(name, value) {
					if (checkCanConfigure("cssProperties")) {
						cssProperties.push([name, value]);
					}
				};

				// Define useful variables
				var windowCreationStarted = false;
				var iframeContainerDiv;
				var iframeId = uniqueId + "_InPageAppender_" + consoleAppenderId;

				this.hide = function() {
					if (initialized && consoleWindowCreated) {
						if (consoleWindowExists()) {
							getConsoleWindow().$("command").blur();
						}
						iframeContainerDiv.style.display = "none";
						minimized = true;
					}
				};

				this.show = function() {
					if (initialized) {
						if (consoleWindowCreated) {
							iframeContainerDiv.style.display = "block";
							this.setShowCommandLine(showCommandLine); // Force IE to update
							minimized = false;
						} else if (!windowCreationStarted) {
							createWindow(true);
						}
					}
				};

				this.isVisible = function() {
					return !minimized && !consoleClosed;
				};

				this.close = function(fromButton) {
					if (!consoleClosed && (!fromButton || confirm("This will permanently remove the console from the page. No more messages will be logged. Do you wish to continue?"))) {
						iframeContainerDiv.parentNode.removeChild(iframeContainerDiv);
						this.unload();
					}
				};

				// Create open, init, getConsoleWindow and safeToAppend functions
				open = function() {
					var initErrorMessage = "InPageAppender.open: unable to create console iframe";

					function finalInit() {
						try {
							if (!initiallyMinimized) {
								appender.show();
							}
							consoleWindowLoadHandler();
							consoleWindowLoaded = true;
							appendQueuedLoggingEvents();
						} catch (ex) {
							isSupported = false;
							handleError(initErrorMessage, ex);
						}
					}

					function writeToDocument() {
						try {
							var windowTest = function(win) { return isLoaded(win); };
							if (useDocumentWrite) {
								writeHtml(getConsoleWindow().document);
							}
							if (windowTest(getConsoleWindow())) {
								finalInit();
							} else {
								pollConsoleWindow(windowTest, 100, finalInit, initErrorMessage);
							}
						} catch (ex) {
							isSupported = false;
							handleError(initErrorMessage, ex);
						}
					}

					minimized = false;
					iframeContainerDiv = containerElement.appendChild(document.createElement("div"));

					iframeContainerDiv.style.width = width;
					iframeContainerDiv.style.height = height;
					iframeContainerDiv.style.border = "solid gray 1px";

					for (var i = 0, len = cssProperties.length; i < len; i++) {
						iframeContainerDiv.style[cssProperties[i][0]] = cssProperties[i][1];
					}

					var iframeSrc = useDocumentWrite ? "" : " src='" + getConsoleUrl() + "'";

					// Adding an iframe using the DOM would be preferable, but it doesn't work
					// in IE5 on Windows, or in Konqueror prior to version 3.5 - in Konqueror
					// it creates the iframe fine but I haven't been able to find a way to obtain
					// the iframe's window object
					iframeContainerDiv.innerHTML = "<iframe id='" + iframeId + "' name='" + iframeId +
						"' width='100%' height='100%' frameborder='0'" + iframeSrc +
						" scrolling='no'></iframe>";
					consoleClosed = false;

					// Write the console HTML to the iframe
					var iframeDocumentExistsTest = function(win) {
						try {
							return bool(win) && bool(win.document);
						} catch (ex) {
							return false;
						}
					};
					if (iframeDocumentExistsTest(getConsoleWindow())) {
						writeToDocument();
					} else {
						pollConsoleWindow(iframeDocumentExistsTest, 100, writeToDocument, initErrorMessage);
					}
					consoleWindowCreated = true;
				};

				createWindow = function(show) {
					if (show || !initiallyMinimized) {
						var pageLoadHandler = function() {
							if (!container) {
								// Set up default container element
								containerElement = document.createElement("div");
								containerElement.style.position = "fixed";
								containerElement.style.left = "0";
								containerElement.style.right = "0";
								containerElement.style.bottom = "0";
								document.body.appendChild(containerElement);
								appender.addCssProperty("borderWidth", "1px 0 0 0");
								appender.addCssProperty("zIndex", 1000000); // Can't find anything authoritative that says how big z-index can be
								open();
							} else {
								try {
									var el = document.getElementById(container);
									if (el.nodeType == 1) {
										containerElement = el;
									}
									open();
								} catch (ex) {
									handleError("InPageAppender.init: invalid container element '" + container + "' supplied", ex);
								}
							}
						};

						// Test the type of the container supplied. First, check if it's an element
						if (pageLoaded && container && container.appendChild) {
							containerElement = container;
							open();
						} else if (pageLoaded) {
							pageLoadHandler();
						} else {
							log4javascript.addEventListener("load", pageLoadHandler);
						}
						windowCreationStarted = true;
					}
				};

				init = function() {
					createWindow();
					initialized = true;
				};

				getConsoleWindow = function() {
					var iframe = window.frames[iframeId];
					if (iframe) {
						return iframe;
					}
				};

				safeToAppend = function() {
					if (isSupported && !consoleClosed) {
						if (consoleWindowCreated && !consoleWindowLoaded && getConsoleWindow() && isLoaded(getConsoleWindow())) {
							consoleWindowLoaded = true;
						}
						return consoleWindowLoaded;
					}
					return false;
				};
			} else {
				// PopUpAppender

				// Extract params
				var useOldPopUp = appender.defaults.useOldPopUp;
				var complainAboutPopUpBlocking = appender.defaults.complainAboutPopUpBlocking;
				var reopenWhenClosed = this.defaults.reopenWhenClosed;

				// Configuration methods. The function scope is used to prevent
				// direct alteration to the appender configuration properties.
				this.isUseOldPopUp = function() { return useOldPopUp; };
				this.setUseOldPopUp = function(useOldPopUpParam) {
					if (checkCanConfigure("useOldPopUp")) {
						useOldPopUp = bool(useOldPopUpParam);
					}
				};

				this.isComplainAboutPopUpBlocking = function() { return complainAboutPopUpBlocking; };
				this.setComplainAboutPopUpBlocking = function(complainAboutPopUpBlockingParam) {
					if (checkCanConfigure("complainAboutPopUpBlocking")) {
						complainAboutPopUpBlocking = bool(complainAboutPopUpBlockingParam);
					}
				};

				this.isFocusPopUp = function() { return focusConsoleWindow; };
				this.setFocusPopUp = function(focusPopUpParam) {
					// This property can be safely altered after logging has started
					focusConsoleWindow = bool(focusPopUpParam);
				};

				this.isReopenWhenClosed = function() { return reopenWhenClosed; };
				this.setReopenWhenClosed = function(reopenWhenClosedParam) {
					// This property can be safely altered after logging has started
					reopenWhenClosed = bool(reopenWhenClosedParam);
				};

				this.close = function() {
					logLog.debug("close " + this);
					try {
						popUp.close();
						this.unload();
					} catch (ex) {
						// Do nothing
					}
				};

				this.hide = function() {
					logLog.debug("hide " + this);
					if (consoleWindowExists()) {
						this.close();
					}
				};

				this.show = function() {
					logLog.debug("show " + this);
					if (!consoleWindowCreated) {
						open();
					}
				};

				this.isVisible = function() {
					return safeToAppend();
				};

				// Define useful variables
				var popUp;

				// Create open, init, getConsoleWindow and safeToAppend functions
				open = function() {
					var windowProperties = "width=" + width + ",height=" + height + ",status,resizable";
					var frameInfo = "";
					try {
						var frameEl = window.frameElement;
						if (frameEl) {
							frameInfo = "_" + frameEl.tagName + "_" + (frameEl.name || frameEl.id || "");
						}
					} catch (e) {
						frameInfo = "_inaccessibleParentFrame";
					}
					var windowName = "PopUp_" + location.host.replace(/[^a-z0-9]/gi, "_") + "_" + consoleAppenderId + frameInfo;
					if (!useOldPopUp || !useDocumentWrite) {
						// Ensure a previous window isn't used by using a unique name
						windowName = windowName + "_" + uniqueId;
					}

					var checkPopUpClosed = function(win) {
						if (consoleClosed) {
							return true;
						} else {
							try {
								return bool(win) && win.closed;
							} catch(ex) {}
						}
						return false;
					};

					var popUpClosedCallback = function() {
						if (!consoleClosed) {
							appender.unload();
						}
					};

					function finalInit() {
						getConsoleWindow().setCloseIfOpenerCloses(!useOldPopUp || !useDocumentWrite);
						consoleWindowLoadHandler();
						consoleWindowLoaded = true;
						appendQueuedLoggingEvents();
						pollConsoleWindow(checkPopUpClosed, 500, popUpClosedCallback,
								"PopUpAppender.checkPopUpClosed: error checking pop-up window");
					}

					try {
						popUp = window.open(getConsoleUrl(), windowName, windowProperties);
						consoleClosed = false;
						consoleWindowCreated = true;
						if (popUp && popUp.document) {
							if (useDocumentWrite && useOldPopUp && isLoaded(popUp)) {
								popUp.mainPageReloaded();
								finalInit();
							} else {
								if (useDocumentWrite) {
									writeHtml(popUp.document);
								}
								// Check if the pop-up window object is available
								var popUpLoadedTest = function(win) { return bool(win) && isLoaded(win); };
								if (isLoaded(popUp)) {
									finalInit();
								} else {
									pollConsoleWindow(popUpLoadedTest, 100, finalInit,
											"PopUpAppender.init: unable to create console window");
								}
							}
						} else {
							isSupported = false;
							logLog.warn("PopUpAppender.init: pop-ups blocked, please unblock to use PopUpAppender");
							if (complainAboutPopUpBlocking) {
								handleError("log4javascript: pop-up windows appear to be blocked. Please unblock them to use pop-up logging.");
							}
						}
					} catch (ex) {
						handleError("PopUpAppender.init: error creating pop-up", ex);
					}
				};

				createWindow = function() {
					if (!initiallyMinimized) {
						open();
					}
				};

				init = function() {
					createWindow();
					initialized = true;
				};

				getConsoleWindow = function() {
					return popUp;
				};

				safeToAppend = function() {
					if (isSupported && !isUndefined(popUp) && !consoleClosed) {
						if (popUp.closed ||
								(consoleWindowLoaded && isUndefined(popUp.closed))) { // Extra check for Opera
							appender.unload();
							logLog.debug("PopUpAppender: pop-up closed");
							return false;
						}
						if (!consoleWindowLoaded && isLoaded(popUp)) {
							consoleWindowLoaded = true;
						}
					}
					return isSupported && consoleWindowLoaded && !consoleClosed;
				};
			}

			// Expose getConsoleWindow so that automated tests can check the DOM
			this.getConsoleWindow = getConsoleWindow;
		};

		ConsoleAppender.addGlobalCommandLineFunction = function(functionName, commandLineFunction) {
			defaultCommandLineFunctions.push([functionName, commandLineFunction]);
		};

		/* ------------------------------------------------------------------ */

		function PopUpAppender(lazyInit, initiallyMinimized, useDocumentWrite,
							   width, height) {
			this.create(false, null, lazyInit, initiallyMinimized,
					useDocumentWrite, width, height, this.defaults.focusPopUp);
		}

		PopUpAppender.prototype = new ConsoleAppender();

		PopUpAppender.prototype.defaults = {
			layout: new PatternLayout("%d{HH:mm:ss} %-5p - %m{1}%n"),
			initiallyMinimized: false,
			focusPopUp: false,
			lazyInit: true,
			useOldPopUp: true,
			complainAboutPopUpBlocking: true,
			newestMessageAtTop: false,
			scrollToLatestMessage: true,
			width: "600",
			height: "400",
			reopenWhenClosed: false,
			maxMessages: null,
			showCommandLine: true,
			commandLineObjectExpansionDepth: 1,
			showHideButton: false,
			showCloseButton: true,
			useDocumentWrite: true
		};

		PopUpAppender.prototype.toString = function() {
			return "PopUpAppender";
		};

		log4javascript.PopUpAppender = PopUpAppender;

		/* ------------------------------------------------------------------ */

		function InPageAppender(container, lazyInit, initiallyMinimized,
								useDocumentWrite, width, height) {
			this.create(true, container, lazyInit, initiallyMinimized,
					useDocumentWrite, width, height, false);
		}

		InPageAppender.prototype = new ConsoleAppender();

		InPageAppender.prototype.defaults = {
			layout: new PatternLayout("%d{HH:mm:ss} %-5p - %m{1}%n"),
			initiallyMinimized: false,
			lazyInit: true,
			newestMessageAtTop: false,
			scrollToLatestMessage: true,
			width: "100%",
			height: "220px",
			maxMessages: null,
			showCommandLine: true,
			commandLineObjectExpansionDepth: 1,
			showHideButton: false,
			showCloseButton: false,
			showLogEntryDeleteButtons: true,
			useDocumentWrite: true
		};

		InPageAppender.prototype.toString = function() {
			return "InPageAppender";
		};

		log4javascript.InPageAppender = InPageAppender;

		// Next line for backwards compatibility
		log4javascript.InlineAppender = InPageAppender;
	})();
	/* ---------------------------------------------------------------------- */
	// Console extension functions

	function padWithSpaces(str, len) {
		if (str.length < len) {
			var spaces = [];
			var numberOfSpaces = Math.max(0, len - str.length);
			for (var i = 0; i < numberOfSpaces; i++) {
				spaces[i] = " ";
			}
			str += spaces.join("");
		}
		return str;
	}

	(function() {
		function dir(obj) {
			var maxLen = 0;
			// Obtain the length of the longest property name
			for (var p in obj) {
				maxLen = Math.max(toStr(p).length, maxLen);
			}
			// Create the nicely formatted property list
			var propList = [];
			for (p in obj) {
				var propNameStr = "  " + padWithSpaces(toStr(p), maxLen + 2);
				var propVal;
				try {
					propVal = splitIntoLines(toStr(obj[p])).join(padWithSpaces(newLine, maxLen + 6));
				} catch (ex) {
					propVal = "[Error obtaining property. Details: " + getExceptionMessage(ex) + "]";
				}
				propList.push(propNameStr + propVal);
			}
			return propList.join(newLine);
		}

		var nodeTypes = {
			ELEMENT_NODE: 1,
			ATTRIBUTE_NODE: 2,
			TEXT_NODE: 3,
			CDATA_SECTION_NODE: 4,
			ENTITY_REFERENCE_NODE: 5,
			ENTITY_NODE: 6,
			PROCESSING_INSTRUCTION_NODE: 7,
			COMMENT_NODE: 8,
			DOCUMENT_NODE: 9,
			DOCUMENT_TYPE_NODE: 10,
			DOCUMENT_FRAGMENT_NODE: 11,
			NOTATION_NODE: 12
		};

		var preFormattedElements = ["script", "pre"];

		// This should be the definitive list, as specified by the XHTML 1.0 Transitional DTD
		var emptyElements = ["br", "img", "hr", "param", "link", "area", "input", "col", "base", "meta"];
		var indentationUnit = "  ";

		// Create and return an XHTML string from the node specified
		function getXhtml(rootNode, includeRootNode, indentation, startNewLine, preformatted) {
			includeRootNode = (typeof includeRootNode == "undefined") ? true : !!includeRootNode;
			if (typeof indentation != "string") {
				indentation = "";
			}
			startNewLine = !!startNewLine;
			preformatted = !!preformatted;
			var xhtml;

			function isWhitespace(node) {
				return ((node.nodeType == nodeTypes.TEXT_NODE) && /^[ \t\r\n]*$/.test(node.nodeValue));
			}

			function fixAttributeValue(attrValue) {
				return attrValue.toString().replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/"/g, "&quot;");
			}

			function getStyleAttributeValue(el) {
				var stylePairs = el.style.cssText.split(";");
				var styleValue = "";
				for (var j = 0, len = stylePairs.length; j < len; j++) {
					var nameValueBits = stylePairs[j].split(":");
					var props = [];
					if (!/^\s*$/.test(nameValueBits[0])) {
						props.push(trim(nameValueBits[0]).toLowerCase() + ":" + trim(nameValueBits[1]));
					}
					styleValue = props.join(";");
				}
				return styleValue;
			}

			function getNamespace(el) {
				if (el.prefix) {
					return el.prefix;
				} else if (el.outerHTML) {
					var regex = new RegExp("<([^:]+):" + el.tagName + "[^>]*>", "i");
					if (regex.test(el.outerHTML)) {
						return RegExp.$1.toLowerCase();
					}
				}
                return "";
			}

			var lt = "<";
			var gt = ">";
			var i, len;

			if (includeRootNode && rootNode.nodeType != nodeTypes.DOCUMENT_FRAGMENT_NODE) {
				switch (rootNode.nodeType) {
					case nodeTypes.ELEMENT_NODE:
						var tagName = rootNode.tagName.toLowerCase();
						xhtml = startNewLine ? newLine + indentation : "";
						xhtml += lt;
						// Allow for namespaces, where present
						var prefix = getNamespace(rootNode);
						var hasPrefix = !!prefix;
						if (hasPrefix) {
							xhtml += prefix + ":";
						}
						xhtml += tagName;
						for (i = 0, len = rootNode.attributes.length; i < len; i++) {
							var currentAttr = rootNode.attributes[i];
							// Check the attribute is valid.
							if (!	currentAttr.specified ||
									currentAttr.nodeValue === null ||
									currentAttr.nodeName.toLowerCase() === "style" ||
									typeof currentAttr.nodeValue !== "string" ||
									currentAttr.nodeName.indexOf("_moz") === 0) {
								continue;
							}
							xhtml += " " + currentAttr.nodeName.toLowerCase() + "=\"";
							xhtml += fixAttributeValue(currentAttr.nodeValue);
							xhtml += "\"";
						}
						// Style needs to be done separately as it is not reported as an
						// attribute in IE
						if (rootNode.style.cssText) {
							var styleValue = getStyleAttributeValue(rootNode);
							if (styleValue !== "") {
								xhtml += " style=\"" + getStyleAttributeValue(rootNode) + "\"";
							}
						}
						if (array_contains(emptyElements, tagName) ||
								(hasPrefix && !rootNode.hasChildNodes())) {
							xhtml += "/" + gt;
						} else {
							xhtml += gt;
							// Add output for childNodes collection (which doesn't include attribute nodes)
							var childStartNewLine = !(rootNode.childNodes.length === 1 &&
								rootNode.childNodes[0].nodeType === nodeTypes.TEXT_NODE);
							var childPreformatted = array_contains(preFormattedElements, tagName);
							for (i = 0, len = rootNode.childNodes.length; i < len; i++) {
								xhtml += getXhtml(rootNode.childNodes[i], true, indentation + indentationUnit,
									childStartNewLine, childPreformatted);
							}
							// Add the end tag
							var endTag = lt + "/" + tagName + gt;
							xhtml += childStartNewLine ? newLine + indentation + endTag : endTag;
						}
						return xhtml;
					case nodeTypes.TEXT_NODE:
						if (isWhitespace(rootNode)) {
							xhtml = "";
						} else {
							if (preformatted) {
								xhtml = rootNode.nodeValue;
							} else {
								// Trim whitespace from each line of the text node
								var lines = splitIntoLines(trim(rootNode.nodeValue));
								var trimmedLines = [];
								for (i = 0, len = lines.length; i < len; i++) {
									trimmedLines[i] = trim(lines[i]);
								}
								xhtml = trimmedLines.join(newLine + indentation);
							}
							if (startNewLine) {
								xhtml = newLine + indentation + xhtml;
							}
						}
						return xhtml;
					case nodeTypes.CDATA_SECTION_NODE:
						return "<![CDA" + "TA[" + rootNode.nodeValue + "]" + "]>" + newLine;
					case nodeTypes.DOCUMENT_NODE:
						xhtml = "";
						// Add output for childNodes collection (which doesn't include attribute nodes)
						for (i = 0, len = rootNode.childNodes.length; i < len; i++) {
							xhtml += getXhtml(rootNode.childNodes[i], true, indentation);
						}
						return xhtml;
					default:
						return "";
				}
			} else {
				xhtml = "";
				// Add output for childNodes collection (which doesn't include attribute nodes)
				for (i = 0, len = rootNode.childNodes.length; i < len; i++) {
					xhtml += getXhtml(rootNode.childNodes[i], true, indentation + indentationUnit);
				}
				return xhtml;
			}
		}

		function createCommandLineFunctions() {
			ConsoleAppender.addGlobalCommandLineFunction("$", function(appender, args, returnValue) {
				return document.getElementById(args[0]);
			});

			ConsoleAppender.addGlobalCommandLineFunction("dir", function(appender, args, returnValue) {
				var lines = [];
				for (var i = 0, len = args.length; i < len; i++) {
					lines[i] = dir(args[i]);
				}
				return lines.join(newLine + newLine);
			});

			ConsoleAppender.addGlobalCommandLineFunction("dirxml", function(appender, args, returnValue) {
				var lines = [];
				for (var i = 0, len = args.length; i < len; i++) {
					lines[i] = getXhtml(args[i]);
				}
				return lines.join(newLine + newLine);
			});

			ConsoleAppender.addGlobalCommandLineFunction("cd", function(appender, args, returnValue) {
				var win, message;
				if (args.length === 0 || args[0] === "") {
					win = window;
					message = "Command line set to run in main window";
				} else {
					if (args[0].window == args[0]) {
						win = args[0];
						message = "Command line set to run in frame '" + args[0].name + "'";
					} else {
						win = window.frames[args[0]];
						if (win) {
							message = "Command line set to run in frame '" + args[0] + "'";
						} else {
							returnValue.isError = true;
							message = "Frame '" + args[0] + "' does not exist";
							win = appender.getCommandWindow();
						}
					}
				}
				appender.setCommandWindow(win);
				return message;
			});

			ConsoleAppender.addGlobalCommandLineFunction("clear", function(appender, args, returnValue) {
				returnValue.appendResult = false;
				appender.clear();
			});

			ConsoleAppender.addGlobalCommandLineFunction("keys", function(appender, args, returnValue) {
				var keys = [];
				for (var k in args[0]) {
					keys.push(k);
				}
				return keys;
			});

			ConsoleAppender.addGlobalCommandLineFunction("values", function(appender, args, returnValue) {
				var values = [];
				for (var k in args[0]) {
					try {
						values.push(args[0][k]);
					} catch (ex) {
						logLog.warn("values(): Unable to obtain value for key " + k + ". Details: " + getExceptionMessage(ex));
					}
				}
				return values;
			});

			ConsoleAppender.addGlobalCommandLineFunction("expansionDepth", function(appender, args, returnValue) {
				var expansionDepth = parseInt(args[0], 10);
				if (isNaN(expansionDepth) || expansionDepth < 0) {
					returnValue.isError = true;
					return "" + args[0] + " is not a valid expansion depth";
				} else {
					appender.setCommandLineObjectExpansionDepth(expansionDepth);
					return "Object expansion depth set to " + expansionDepth;
				}
			});
		}

		function init() {
			// Add command line functions
			createCommandLineFunctions();
		}

		/* ------------------------------------------------------------------ */

		init();
	})();

	/* ---------------------------------------------------------------------- */

	function createDefaultLogger() {
		var logger = log4javascript.getLogger(defaultLoggerName);
		var a = new log4javascript.PopUpAppender();
		logger.addAppender(a);
		return logger;
	}

	/* ---------------------------------------------------------------------- */
	// Main load

	log4javascript.setDocumentReady = function() {
		pageLoaded = true;
		log4javascript.dispatchEvent("load", {});
	};

	if (window.addEventListener) {
		window.addEventListener("load", log4javascript.setDocumentReady, false);
	} else if (window.attachEvent) {
		window.attachEvent("onload", log4javascript.setDocumentReady);
	} else {
		var oldOnload = window.onload;
		if (typeof window.onload != "function") {
			window.onload = log4javascript.setDocumentReady;
		} else {
			window.onload = function(evt) {
				if (oldOnload) {
					oldOnload(evt);
				}
				log4javascript.setDocumentReady();
			};
		}
	}

	return log4javascript;
}, this);